1、The enclosure has the function of heat dissipation and protection, suitable for Raspberry Pi 4 B. 2、The heat dissipation enclosure has multiple reserved interfaces, which will not affect the use of the motherboard after installation. 3、Made of aluminum alloy, has high strength and corrosion resistance, not easy to deform or rust. 4、With a good heat dissipation structure design, it can be used without installing a cooling fan or radiator. 5、Equipped with anti slip mat and thermal silicone, stable installation and not easy to fall off, safer to use. Item Type: Heat Dissipation Enclosure Material: Aluminum alloy Product Size: Approx. 90 x 65 x 26mm / 3.5 x 2.6 x 1in 1 x Upper Cover 1 x Lower Cover 4 x Screws 4 x Anti Slip Mats 5 x Thermal Silicone