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This Geekworm Embedded Armor Aluminum Alloy Heatsink is only designed for Raspberry Pi 4 Model B 1GB/2GB/4GB/8GB Version, ultra-thin embedded heatsink with ONLY 7mm thickness. User manual,please refer to raspberrypiwiki (P165)
Supports to cooling down the Raspberry Pi 4 board when using the Pi 4 expansion board(do not support PoE board); It is compatible with Raspberry Pi 4 expansion board, for example: X825(ASIN:B07VXF2HJG), X857(ASIN:B085HG7ZLJ),X750(ASIN:B07VPWFK9H) to slove the raspberry pi 4 overheat problem.
Consider different Raspberry Pi 4 expansion board has different height after installation, we add a variety of screws and copper spacers with different height as follow: 8 x M2.5×5 +5mm Spacers; 4 x M2.5×13 +6mm Spacers ; 4 x M2.5×13 +6mm Spacers ; 4 x M2.5×14 +6mm Spacers ; 4 x M2.5×15 +6mm Spacers ; 4 x M2.5×16 +6mm Spacers
Raspberry Pi HAT positioning hole is M2.5 internal thread; (this design is convenient to fix), use good quality mute 5v cooling fan, don’t worry about the noise of fan
Supports the installation of 25mm fan; Cooling fan can be added when the heat dissipation of a single aluminum heat sink is not enough, so that all Pi 4 heat dissipation problems can be solved.