This is an aluminum heat sink designed to fit on a Compute Module 5. It includes thermal pads for maximum heat transfer from the CPU, memory, wireless module (if fitted) and eMMC (if fitted) components to the heatsink itself. We highly recommend using one with the new Compute Module 5 line. https://elecena.pl/product/27340621/raspberry-pi-compute-module-5-passive-cooler 2024-11-27 https://elecena.pl/product/27340621/raspberry-pi-compute-module-5-passive-cooler 2025-04-12 https://elecena.pl/product/27340621/raspberry-pi-compute-module-5-passive-cooler 2025-04-14 https://elecena.pl/product/27340621/raspberry-pi-compute-module-5-passive-cooler 2025-09-19