Feature:The heatsink is a special tool for RPI 2B.This heatsink come with ordinary self adhesive, easy to use, strong stickiness.Aluminum heatsink can be applied on 3D printers, IC , electronic, RAM, computer's chip component heat dissipation or anywhere you need an efficient heatsink.Specification:Color: BlackMaterial: Aluminum AlloySize 1: 14 x 14 x 7 mm / 0.55 x 0.55 x 0.28 inch (L*W*H)Size 2: 8.8 x 8.8 x 5 mm / 0.35 x 0.35 x 0.2 inch (L*W*H)Package Content:10 x Size 1 Heatsink10 x Size 2 HeatsinkTotal 20 Pieces