Widely use for high power electric device, LED light devices etc.Use heatsink adhesive glue to install heatsink .(Glue is not included)Please check the specification table and make sure that the size of the heatsink fits that of your component. Feature - It is designed for LED lighting lamps and lanterns, LED the cylinder light, such as heat dissipation design and production test.- Aluminum extrusion heatsink structure, Strong heat conductivity and heat dissipation- Fit for about 8pcs x 3W / 20pcs x 1W LEDs module( emitter),totoal upto 24 Watt- Better cooling for LED light if adding a fan , and will cool more leds;