Amazon.com: Aluminum Heat Sink Heatsink Module Cooler Fin for High Power Amplifier Transistor Semiconductor Devices with Dense 19 pcs Fins 11.8"(L) x 5.51"(W) x 0.79"(H) / 300 mm (L) x 140 mm (
Aluminum Heatsink for Raspberry Pi 4B (3-Pack) - PiShop.us