Ultra-Quiet 3510 Cooling Fan Kit with Aluminum Heatsink. 1x Thin Copper Heatsink for Pi 3B+/3B. 2x Thermal Tapes for Pi 3B+/3B. 2x Thermal Tapes for Pi 4B. The sleek aluminum heatsink and powerful fan work in harmony to provide unparalleled heat dissipation, ensuring your Raspberry Pi remains cool even during demanding tasks.
eBay