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, has a variety of interfaces, and has high expansion capabilities. Specification Item Type: Heatsink Material: Aluminum Alloy Applicable Models: for RasPi 4b Package List 1 x Shell Upper Layer 1 x Shell Lower Layer 1 x Hex Wrench 4 x Screws 4 x Heat Sinks