Features: 1. Perfect Compatibility: Practical accessory, aluminum heatsink for Raspberry Pi 4 B type motherboard. 2. Aluminum Alloy: Heatsink is made of premium aluminum alloy, which has high hardness and is not easy to rust, which is conducive to heat dissipation. 3. Safety Protection: Heatsink has excellent sealing, safety shielding cover, and guards the motherboard. 4. 3 Heat Dissipation Columns: Embedded heatsink with three heat dissipation columns to enhance the heat dissipation effect of the aluminum alloy itself. 5. Multiple Interfaces: Heatsink cooler has rich interfaces, supports various connections, and offers high expandability. Specification: Item Type: Heatsink Material: Aluminum Alloy Applicable Models: for Raspberry Pi 4B Package List: 1 x Shell Upper Layer, 1 x Shell Lower Layer, 1 x Hex Wrench, 4 x Screws, 4 x Heat Sinks