Copper Water Cooling Block CPU Cooler Heat Sink 40x40mm TT4040B | eBay
Amazon.com: Pure Copper Water Cooling Block 40x40mm for Liquid Water Cooler Heat Sink System Silver for CPU Graphics Radiator Heatsink (1 Pack) : Electronics
36mm Motor Heatsink+40x40mm Cooling Fan 17k rpm for 1/10 TR-MT10E & TRX-4 for R/C or RC - Team Integy
40mm Heatsink 40x40x11mm - Easycargo
Amazon.com: Water Cooling Block 40x40mm Aluminum for Liquid Water Cooler Heat Sink System Silver for CPU Graphics Radiator Heatsink (2 Pack) : Electronics
40x40mm Pure Aluminum Round Heat Sink Radiator Heatsink For Cooling, Electronic Cooler, Chipset Heat Dissipation Customize - Tool Parts - AliExpress