Led 1w red alingap smd - Allicdata Electronics

Related Categories

< 2 3 4 5 6 >

Allicdata Part#	Mft.Part#	Company	Spec.	QTY.	Pricing(USD)
EPS-300-1-RED-N D	EPS-300-1-RED	3M	View more Series: EPS-300 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 3 to 1 Inner Diameter - Supplied: 1.000" (25.40mm) Inner Diameter - Recovered: 0.320" (8.13mm) Recovered Wall Thickness: 0.100" (2.54mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Corrosion Resistant, Flame Retardant, Fluid Resistant, Self Extinguishing, Water Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	10+: $15.9044
TMW.183X1.5-RED -BULK-ND	TMW.183X1.5-RED -BULK	3M	View more Series: TMW Part Status: Obsolete Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Semi Rigid Shrinkage Ratio: 3 to 1 Length: 0.125' (38.10mm, 1.50") Inner Diameter - Supplied: 0.183" (4.65mm) Inner Diameter - Recovered: 0.060" (1.52mm) Recovered Wall Thickness: 0.049" (1.24mm) Material: Polyolefin (PO) Features: Adhesive Lined Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 135C	1000 Order	1+: $0
TMW-.183X1.5-RE D-BOX-ND	TMW-.183X1.5-RE D-BOX	3M	View more Series: TMW Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Semi Rigid Shrinkage Ratio: 3 to 1 Length: 0.125' (38.10mm, 1.50") Inner Diameter - Supplied: 0.183" (4.65mm) Inner Diameter - Recovered: 0.060" (1.52mm) Recovered Wall Thickness: 0.049" (1.24mm) Material: Polyolefin (PO) Features: Adhesive Lined Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 135C	1000 Order	15000+: $0.0683
FTA-BL-SFP+/RED -ND	FTA-BL-SFP+/RED	Finisar Corporation	View more Part Status: Active Accessory Type: Latch For Use With/Related Products: SFP+ Modules	1000 Order	900+: $0.2095
1.5-5-471-RED-N D	1.5-5-471 - RED	3M (TC)	View more Series: 471 Part Status: Active	1000 Order	4+: $10.6171
2-5-471-RED-ND	2-5-471 - RED	3M (TC)	View more Series: 471 Part Status: Active	1000 Order	3+: $12.8646
4-5-471-RED-ND	4-5-471 - RED	3M (TC)	View more Series: 471 Part Status: Active	1000 Order	2+: $22.8375
3-5-471-RED-ND	3-5-471 - RED	3M (TC)	View more Series: 471 Part Status: Active	1000 Order	2+: $18.0306
A-MOT-8/8-RED-N D	A-MOT-8/8-RED	ASSMANN WSW Components	View more Part Status: Obsolete Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Accessory Type: Boot, Hooded Moisture Sensitivity Level (MSL): 1 (Unlimited) For Use With/Related Products: RJ45 Plugs Color: Red	1000 Order	1+: $0
243-1200-ND	26505-LED	Aven Tools	View more Series: Mighty Vue Part Status: Obsolete Lamp/Magnifier Type: Lamp, Magnifier Voltage: 115V Lens Style/Size: 3 Diopter (1.75x), 7.00" L x 6.00" W (177.80mm x 152.40mm) Bulb: LED, White Arm: 32.00" (812.8mm) Color: White Mounting Type: Edge Clamp Weight: 10 lbs (4.5kg)	1000 Order	1+: $0
243-1141-ND	26508-LED	Aven Tools	View more Series: ProVue Touch Part Status: Active Lamp/Magnifier Type: Lamp, Magnifier Voltage: 110V, 220V Lens Style/Size: 3 Diopter (1.75x), 7.00" (177.80mm) Diameter Bulb: LED, White (108) Arm: 35.00" (889.0mm) Color: White Mounting Type: Edge Clamp Weight: 11 lbs (5kg)	24 Order	1+: $158.376
243-1123-ND	26034-LED	Aven Tools	View more Part Status: Active Type: Loupe Lens Diameter: 1.00" (25.40mm) Magnification Range: 10x	1042 Order	1+: $3.2823
243-1154-ND	26502-LED	Aven Tools	View more Series: ProVue Part Status: Obsolete Lamp/Magnifier Type: Lamp, Magnifier Voltage: 110V, 220V Lens Style/Size: 5 Diopter (2.25x), 4.75" (120.00mm) Diameter Bulb: LED, White (45) Arm: 32.00" (812.8mm) Color: White Mounting Type: Edge Clamp Cord Length: 5' (1.52m) Weight: 6.9 lbs (3.1kg)	1000 Order	1+: $0
243-1064-ND	26501-LED	Aven Tools	View more Series: ProVue Part Status: Active Lamp/Magnifier Type: Lamp, Magnifier Voltage: 110V, 220V Lens Style/Size: 5 Diopter (2.25x), 5.00" (127.00mm) Diameter Bulb: LED, White (45) Arm: 36.00" (914.4mm) Color: White Mounting Type: Edge Clamp Weight: 6.5 lbs (2.9kg)	105 Order	1+: $63.5985
497-10420-ND	EVL6562A-LED	STMicroelectronics	View more Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Current - Output / Channel: 350mA Moisture Sensitivity Level (MSL): 1 (Unlimited) Outputs and Type: 1, Non-Isolated Features: Dimmable Voltage - Input: 48V Supplied Contents: Board(s) Utilized IC / Part: L6562A	1 Order	1+: $23.625
CDPM1071-ND	LED-B	C-Ton Industries	View more Series: DK600 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Accessory Type: Bezel For Use With/Related Products: DK600 Series Specifications: Rectangular 68.00mm x 32.50mm Outside Dim Includes: Bezel, Hardware	23 Order	1+: $1.4364 10+: $1.3469 25+: $1.197 50+: $1.1372 100+: $1.0773 250+: $0.9576 500+: $0.8978 1000+: $0.8379 5000+: $0.808
889-1493-ND	AW2S-LED	Amphenol Sine Systems Corp	View more Series: AT Series Part Status: Active Accessory Type: Wedge for Sockets Number of Positions: 2 For Use With/Related Products: AT Series	1174 Order	1+: $0.189 10+: $0.1764 25+: $0.1512 50+: $0.1285 100+: $0.1235 250+: $0.1109 500+: $0.1058 1000+: $0.0882 2500+: $0.0806
1647-1022-2-ND	12V-SB-RED-12M	Inspired LED, LLC	View more Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Type: LED Engine Color: Red Wavelength: 625nm Configuration: Linear Light Strip, Flexible Voltage - Forward (Vf) (Typ): 12V Viewing Angle: 120 Height: 1.50mm Lens Type: Flat	240 Order	240+: $0.4474 480+: $0.3977 720+: $0.338 1200+: $0.2784 2400+: $0.2645 6000+: $0.2585 12000+: $0.2486
1647-1016-2-ND	12V-NB-RED-12M	Inspired LED, LLC	View more Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Type: LED Engine Color: Red Wavelength: 625nm Configuration: Linear Light Strip, Flexible Voltage - Forward (Vf) (Typ): 12V Viewing Angle: 120 Height: 1.50mm Lens Type: Flat	120 Order	120+: $0.6733 360+: $0.5985 600+: $0.5087 840+: $0.4489 1200+: $0.419 3000+: $0.398 6000+: $0.389 12000+: $0.3741
CONMMCX001-SMD- ND	CONMMCX001-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: MMCX Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount Fastening Type: Snap-On Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Voltage Rating: 170V Mating Cycles: 500 Insertion Loss: 0.2dB	538 Order	1+: $2.0916 25+: $1.9152 100+: $1.8371
CONMCX002-SMD-N D	CONMCX002-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: MCX Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount, Right Angle Fastening Type: Snap-On Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500 Insertion Loss: 0.2dB	988 Order	1+: $2.5578 25+: $2.3436 100+: $2.2529
CONREVSMA001-SM D-ND	CONREVSMA001-SM D	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: RP-SMA Connector Type: Receptacle, Male Pin Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount Fastening Type: Threaded Frequency - Max: 12.4GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500	1000 Order	100+: $2.1848
CONSMA002-SMD-N D	CONSMA002-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: SMA Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount, Right Angle Fastening Type: Threaded Frequency - Max: 12.4GHz Number of Ports: 1 Housing Color: Silver Body Material: Brass Body Finish: Nickel Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500	2238 Order	1+: $2.4066 25+: $2.205 100+: $2.1168
CONREVMCX001-SM D-ND	CONREVMCX001-SM D	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: RP-MCX Connector Type: Receptacle, Male Pin Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount Fastening Type: Push-Pull Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Brass Mating Cycles: 500 Insertion Loss: 0.1dB	1000 Order	100+: $1.9958
CONREVSMA002-SM D-ND	CONREVSMA002-SM D	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: RP-SMA Connector Type: Receptacle, Male Pin Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount, Right Angle Fastening Type: Threaded Frequency - Max: 12.4GHz Number of Ports: 1 Housing Color: Silver Body Material: Brass Body Finish: Nickel Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500	1000 Order	1000+: $2.0941
CONMMCX002-SMD- ND	CONMMCX002-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: MMCX Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount, Right Angle Fastening Type: Snap-On Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Voltage Rating: 170V Mating Cycles: 500 Insertion Loss: 0.3dB	1601 Order	1+: $2.4129 25+: $2.2113 100+: $2.1244
CONREVMCX002-SM D-ND	CONREVMCX002-SM D	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Obsolete Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: RP-MCX Connector Type: Receptacle, Male Pin Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount, Right Angle Fastening Type: Push-Pull Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500 Insertion Loss: 0.1dB	1000 Order	1+: $0
CONMCX001-SMD-N D	CONMCX001-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: MCX Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount Fastening Type: Snap-On Frequency - Max: 6GHz Number of Ports: 1 Housing Color: Gold Body Material: Brass Body Finish: Gold Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500 Insertion Loss: 0.1dB	691 Order	1+: $2.0916 25+: $1.9152 100+: $1.8371
CONSMA001-SMD-N D	CONSMA001-SMD	Linx Technologies Inc.	View more Packaging: Bulk Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Connector Style: SMA Connector Type: Receptacle, Female Socket Contact Termination: Solder Shield Termination: Solder Impedance: 50 Ohm Mounting Type: Surface Mount Fastening Type: Threaded Frequency - Max: 12.4GHz Number of Ports: 1 Housing Color: Silver Body Material: Brass Body Finish: Nickel Center Contact Plating: Gold Dielectric Material: Polytetrafluoroethylene (PTFE) Operating Temperature: -65C ~ 165C Center Contact Material: Beryllium Copper Mating Cycles: 500	1000 Order	100+: $2.2378
3903-RED-2" ;X50YD-ND	3903-RED-2" ;X50YD	3M	View more Series: 3903 Packaging: Roll Part Status: Obsolete Tape Type: Duct Cloth Adhesive: Rubber Backing, Carrier: Vinyl Thickness: 0.0065" (6.5 mils, 0.165mm) Width: 2.00" (50.80mm) Length: 150' (45.7m) 50 yds Color: Red Usage: Color Coding, Moisture Protection, Sealing Temperature Range: 250F (121C) Shelf Life Start: Date of Manufacture Shelf Life: 18 Months	1000 Order	1+: $0
AKSO-200-Z-RED- R-ND	AKSO-200-Z-RED- R	ASSMANN WSW Components	View more Packaging: Bulk Part Status: Active Type: Open Top Gender: Female Sockets Number of Positions or Pins (Grid): 2 (1 x 2) Pitch: 0.079" (2.00mm) Height: 0.136" (3.46mm) Contact Finish: Tin Color: Red	1000 Order	10000+: $0.0573
AKSO-200-G-RED- R-ND	AKSO-200-G-RED- R	ASSMANN WSW Components	View more Packaging: Bulk Part Status: Active Type: Open Top Gender: Female Sockets Number of Positions or Pins (Grid): 2 (1 x 2) Pitch: 0.079" (2.00mm) Height: 0.136" (3.46mm) Contact Finish: Gold Color: Red	1000 Order	10000+: $0.0573
FP-301-1-RED-50 '-ND	FP-301-1-RED-50 '	3M	View more Series: FP-301 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 2 to 1 Length: 50.0' (15.2m) Inner Diameter - Supplied: 1.000" (25.40mm) Inner Diameter - Recovered: 0.500" (12.70mm) Recovered Wall Thickness: 0.035" (0.89mm) Material: Polyolefin (PO) Features: Flame Retardant, Solvent Resistant Color: Red Operating Temperature: -55C ~ 135C Shrink Temperature: 100C	1000 Order	150+: $0.6718
FP301-3-50'-RED -SPOOL-ND	FP301-3-50'-RED -SPOOL	3M	View more Series: FP-301 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 2 to 1 Length: 50.0' (15.2m) Inner Diameter - Supplied: 3.000" (76.20mm) Inner Diameter - Recovered: 1.500" (38.10mm) Recovered Wall Thickness: 0.050" (1.27mm) Material: Polyolefin (PO) Features: Flame Retardant, Solvent Resistant Color: Red Operating Temperature: -55C ~ 135C Shrink Temperature: 100C	1000 Order	50+: $3.056
FP-301-4-RED-50 '-ND	FP-301-4-RED-50 '	3M	View more Series: FP-301 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 2 to 1 Length: 50.0' (15.2m) Inner Diameter - Supplied: 4.000" (101.60mm) Inner Diameter - Recovered: 2.000" (50.80mm) Recovered Wall Thickness: 0.055" (1.40mm) Material: Polyolefin (PO) Features: Flame Retardant, Solvent Resistant Color: Red Operating Temperature: -55C ~ 135C Shrink Temperature: 100C	1000 Order	1+: $200.195
EPS-300-1/2-RED -ND	EPS-300-1/2-RED	3M	View more Series: EPS-300 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 3 to 1 Inner Diameter - Supplied: 0.500" (12.70mm) Inner Diameter - Recovered: 0.160" (4.06mm) Recovered Wall Thickness: 0.070" (1.78mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Corrosion Resistant, Flame Retardant, Fluid Resistant, Self Extinguishing, Water Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	10+: $15.9044
EPS-300-3/4-RED -ND	EPS-300-3/4-RED	3M	View more Series: EPS-300 Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Flexible Shrinkage Ratio: 3 to 1 Inner Diameter - Supplied: 0.750" (19.05mm) Inner Diameter - Recovered: 0.250" (6.35mm) Recovered Wall Thickness: 0.085" (2.16mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Corrosion Resistant, Flame Retardant, Fluid Resistant, Self Extinguishing, Water Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	10+: $15.9044
ITCSN-0800-6-RE D-PACK-ND	ITCSN-0800-6-RE D-PACK	3M	View more Series: ITCSN Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Semi Rigid Shrinkage Ratio: 3 to 1 Length: 0.500' (152.40mm, 6.00") Inner Diameter - Supplied: 0.800" (20.32mm) Inner Diameter - Recovered: 0.200" (5.08mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Split Resistant, UV Resistant, Weather Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	12+: $14.5157
ITCSN-1100-9-RE D-PACK-ND	ITCSN-1100-9-RE D-PACK	3M	View more Series: ITCSN Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Semi Rigid Shrinkage Ratio: 3 to 1 Length: 0.750' (228.60mm, 9.00") Inner Diameter - Supplied: 1.100" (27.94mm) Inner Diameter - Recovered: 0.370" (9.40mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Split Resistant, UV Resistant, Weather Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	12+: $22.7646
ITCSN-0400-6-RE D-PACK-ND	ITCSN-0400-6-RE D-PACK	3M	View more Series: ITCSN Part Status: Active Lead Free Status / RoHS Status: Lead free / RoHS Compliant Type: Tubing, Semi Rigid Shrinkage Ratio: 3 to 1 Length: 0.500' (152.40mm, 6.00") Inner Diameter - Supplied: 0.400" (10.16mm) Inner Diameter - Recovered: 0.150" (3.81mm) Material: Polyolefin (PO), Irradiated Features: Adhesive Lined, Split Resistant, UV Resistant, Weather Resistant Color: Red Operating Temperature: -55C ~ 110C Shrink Temperature: 121C	1000 Order	12+: $12.652

< 2 3 4 5 6 >

Hot Searches: led 1w red alingap smd pwr led source 1w red alingap led 1w amber alingap smd led 1w rd/orn alingap smd pwr led source 1w amber alingap 1w high power red led led 10x10mm red 1w xpower smd led shuen 1w hi power red smd led shwo 1w hi pwr red smd led 1w high power red smd led red clear 1w flush smd led red water-clear 1w smd 1w-star led lighting 1w-star led modules 1w-star led strips pwr led light source 1w red led mini light source 1w red led 10mm 1w hp 636nm red clear pwr led light source 1w red/orn led mini light source 1w red/orn

Search Result:led 1w red alingap smd

Related Categories