ITEM NAME:30 x Aluminum Heatsink Cooler Adhesive Kit for Cooling Raspberry Pi #gib Store Home Promotion Hot Item Add to Fav.Peel the protective liner off on the base of the heatsink. 10 x 14 x 14 x 6mm Aluminum Heatsink. 20 x 8 x 8 x 4mm Aluminum Heatsink. These heatsinks have a layer of thermal adhesive that allow for easy installation on to your board.