Welcome to the store! 1. Universal aluminum alloy metal shell, designed for Raspberry Pi 2 3 B type, with good compatibility. 2. The shell's exterior features a slotted design, which does not affect the transmission of Wi-Fi and Bluetooth signals. 3. Oxidation sandblasting process, high hardness, strong pressure resistance, metallic luster, not easy to rust, long-lasting use. 4. Ultra-thin design, lightweight and durable, built-in heat conduction column, promotes rapid heat dissipation, stable performance. 5. Easy to install and assemble, complete accessories, with stable performance, safe and reliable to use, long-lasting. Item Type: Cooling Shell Material: Aluminum Alloy Compatible PCB: For Raspberry Pi 2 3 B Type Shell Size: Approx. 9.7x6.5x3 cm / 3.8x2.6x1.2 inches 4 x Metal Shell Parts 1 x Screwdriver 10 x Screw 1 x Fan 4 x Fan Screw 4 x Fan Nut Your 100% satisfaction is our top priority. We provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!