Product description 30 PCS High Performance Raspberry Pi Heatsink Kit Aluminum Heatsink for Raspberry Pi B B 2, 3, 4/5,Heatsink Copper Pad Shims, with thermal conductive adhesive tape.Package Includes: 12 pieces - 8mm x 8mm x 5mm aluminum heat sinks 6 pieces - 14mm x 14mm x 5.5mm aluminum heat sink 6 pieces - 14mm x 5mm x 5.5mm aluminum heat sink 6 pieces - 15mm x 15mm x 1mm copper heat sink Supported Boards: Raspberry Pi models A, B, B , 2, 3, 4 boards Product Features: 30 pieces set of heatsinks for the Raspberry Pi models B, B , 2, 3, 4.Reduces CPU and LAN Temperature in Enclosed and Overclocked Environments.Heatsinks are with thermal conductive adhesive tape on the back.Can be used with other devices such as the Beaglebone to cool processors, regulators, etc.These heatsinks are long lasting and have good performance on heat dissipation.Notice: Heatsink kits are small parts, please keep out of the reach of children!