Note:This heatsink come without any thermal tape or adhesive tape, we recommend using some glue (here is not included) to stick.Feature:With smooth surface.It only take seconds to install, easy to install. Application:Aluminum heatsink can be applied to devices to cool LED and power, etc.. Specification:Color: SilverMaterial: Aluminum AlloyOverall Size: 100 x 100 x 18 mm / 3.94 x 3.94 x 0.71 inch (L*W*H) Package Content:1 x Heatsink