50pcs-1000 1W 3W 5W Heat Sink LED Aluminum Base Plate PCB Board Substrate 20mm Star Kit DIY Cooling Heatsink 20 mm for 1 three five W Watt
Diameter:about 20mm/16MM
Color: white and black
Thickness: about 1
Surfacetreatmentprocesses:anodizing
Application: use for welding 1 piece LED beads (1W or 3W)
Package Included:20/50/100/500/1000pcs PCB as you selected.