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 stepper motor and 3D printers. Specification:Color: BlueMaterial: Aluminum AlloyOverall Size: 15 x 14.5 x 13 mm / 0.59 x 0.57 x 0.51 inch (L*W*H) Package Content:12 x Heatsink