Feature:This heatsink is designed for cooling transistors, diodes or voltage regulators (TO-220 components).Aluminum heatsink can be applied on 3D printers, IC, electronic, computer's chip component heat dissipation or anywhere you need an efficient heatsink.Specification:Color: BlackMaterial: Aluminum AlloyBody Overall Size: 25 x 34 x 12 mm / 0.98 x 1.34 x 0.47 inch (L*W*H)Support Pin Count: 2 Package Content:10 x Heatsink10 x Blue Silicone Pads10 x Screws10 x White Plastic Insulators