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Aluminum Metal Heatsink Raspberry Pi 4 Case with Dual Fans : ID 4340 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: GeeekPi Raspberry Pi 4 Armor Case with Dual Fan,Raspberry Pi 4 Passive Aluminum Alloy Case with Cooling Fan for Raspberry Pi 4 Model B (2510 Fan) : Electronics
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