Aluminum Heatsink with Thermal Tape for Raspberry Pi 4 Model B - Silver (Set of 3) - China Raspberry Pi 4 and Raspberry Pi 4 Heatsink price | Made-in-China.com
SparkFun Block for Intel Edison - ADC | Electronics123
Colorful Heat Sink Set Suitable for Raspberry Pi 4B/3B+, 2x Aluminum + 1x Copper, with Gum
Amazon.com: GeeekPi Raspberry Pi 4 Fan Heasink, Raspberry Pi Aluminum Heatsink Cooling Kit for Raspberry Pi 4B/3B/3B+ (B Plus) : Electronics
12mm Aluminum Alloy Heatsink (C235) for Raspberry Pi Compute Module 4 – Geekworm
Amazon.com: GeeekPi Raspberry Pi 4 Aluminum Heatsink with PWM Controllable Fan, Raspberry Pi 4 Armor Lite Heatsink with PWM Speed Control Fan for Raspberry Pi 4 Model B : Electronics
The Great Raspberry Pi Cooling Bake-Off: Comparing Passive Heatsinks and Active Cooling for the Raspberry Pi 4|downey.io
Heat Sinks - Raspberry Pi Forums
4pcs Aluminum Heatsink Radiator Cooler Kit for Raspberry Pi 4B with Sticker - Walmart.com