ITEM NAME:3Pcs/Set Copper Heatsink Heat Sink Cooling Fin Kits For Raspberry Pi 3 Description: Suitable for Raspberry Pi 3 Includes 3 pcs copper heatsink Adhesive tape backing How to use: First tear off the back of the glue, and then place it on the chip of the Raspberry Pi board and gently press it tightly. Raspberry pi not included Specification: Blue heatsink: 9*9*12mm/0.35*0.35*0.47'' Rose Gold Heat Sink: 13*12*5mm/0.51*0.47*0.20'' Gold gasket: 12*13*1mm/0.47*0.51*0.04'' Package Includes: 3Pcs Copper Heatsink SKU: ALU0018576763013391.Suitable for Raspberry Pi 3. How to use: First tear off the back of the glue, and then place it on the chip of the Raspberry Pi board and gently press it tightly. Raspberry pi not included. 3Pcs Copper Heatsink.