100 PCS High Performance Raspberry Pi Heatsink Kit Aluminum and Copper Heatsink for Raspberry Pi 4B, 3B+, 3B, 2B, with thermal conductive adhesive tape. Multiple size and color options: Black: 3 Pcs 14mm x 14mm x 4mm aluminum heat sink 3 Pcs 14mm x 10mm x 5mm aluminum heat sink 6 Pcs 9mm x 9mm x 5mm aluminum heat sink Silver-1: 5 Pcs 14mm x 14mm x 7mm aluminum heat sink 5 Pcs 14mm x 10mm x 5mm aluminum heat sink 10 Pcs 9mm x 9mm x 5mm aluminum heat sink Silver-2: 5 Pcs 14mm x 14mm x 5mm aluminum heat sink 5 Pcs 14mm x 10mm x 5mm aluminum heat sink 10 Pcs 9mm x 9mm x 5mm aluminum heat sink Blue: 3 Pcs 14mm x 14mm x 4mm aluminum heat sink 3 Pcs 14mm x 10mm x 5mm aluminum heat sink 6 Pcs 9mm x 9mm x 5mm aluminum heat sink Copper: 10 Pcs 12mm x 12mm x 1mm copper heat sink 10 Pcs 14mm x 14mm x 1mm copper heat sink