Heatsink for 1W and 3W High Power LED Light - Temperature Dissipate and Diffusion - Aluminium Heat Sink - Component LED - Surface Mount Device It was specially designed to attach our 1W and 3W Star High Power LEDs (not included). Suitable for multiple applications Material: Aluminum w/ Oxidation surface treatment It is used to enhance heat dissipation from hot surfaces like our High Power LEDs, which prevent system failure. With 2 screw holes