Features 1.ALUMINUM ALLOY MATERIAL: The cooling heatsink case is made of aluminum alloy material, which is sturdy and durable, anti rust and wear resistance, with a long service life. 2.DOUBLE SIDED STRIPES AND SLOTS: Aluminum heatsink case's upper and lower covers have double sided stripes and slots, increasing the heat dissipation area and dissipating heat faster. 3.COMMON COMBINATION: Adopting the integrated design of heat conducting columns, combined with the cooling fan, the common heat dissipation effect is better. 4.RESERVED HOLES: The case is reserved with slots for GPIO ports and various interface holes, and also takes into account for RPi WiFi and Bluetooth to reduce wireless signal attenuation. 5.EASY TO INSTALL: Align the motherboard and upper and lower housings with the screw holes, and screw on the screws to complete the installation of the aluminum heatsink case. Specification Item Type: Aluminum Heatsink CaseMaterial: Aluminum AlloySize: Approx. 90.5x65x33mm / 3.56x2.56x1.30in Model: for PI5 CASE IApplication: for RPi 5 Package List 2 x Case4 x Thermal Pad1 x Small Screwdriver1 x Key Cover6 x Screw Note Manual measurement please allow some error.