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Raspberry PI 3B+ case with space for 40x10 5V fan Noctua NF-A4x10 by PCHe | Download free STL model | Printables.com
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GeeekPi 2PCS Raspberry Pi Adjustable Speed Cooling Fan,Raspberry Pi PWM Fan,Raspberry Pi Fan Speed Control 40x40x10mm 4010 Fan DC 5V Quiet Cooler Radiator for Raspberry Pi Range(Black) : Amazon.co.uk: Computers & Accessories
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Raspberry Pi 4 – PoE Texas Hat – 40×10 Noctua Fan Case #3Dprinting #3DThursday « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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Geekworm Raspberry Pi 4 Embedded Heatsink with Fan, Raspberry Pi 4B Armor Aluminum Radiator Compatible with Raspberry Pi 4 Model B & Pi 4 Expansion Board : Amazon.co.uk: Computers & Accessories
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