: and high quality. Feature:Made of aluminum alloy material, oxidized sandblasting process, smooth and nonconvex, high hardness, pressure resistance, strong metallic luster, not easy to rust, aluminum alloy material is more conducive to heat dissipation.The surface is easy to produce a dense and firm protective film to protect the substrate from corrosion, light and durable, strong wear resistance, and difficult to embroider.Built in thermal column, the housing can be equipped with a cooling fan, built-in thermal column, making heat dissipation more effective.All ports and slots of the for case can match with for Raspberry Pi 4 Model B very well.It is for for Raspberry Pi 4 Model B perfectly.Aluminum for Case only, other accessories demo in the picture is not included Specifications:Item Type: Aluminum CaseMaterial: Aluminum AlloySize: 8.5x5.5x2.5cm or 3.3x2.1x0.9inColor: GoldApplicable models: for Raspberry Pi 4Type: A: without cooling fan, B: with cooling fan(Optional)Quantity: 1 Pc Note:Transition: 1cm=10mm=0.39inchPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackage Includes:(Optional)Type A:1 x Aluminum Case1 x Some AccessoriesType B:1 x Aluminum Case1 x Cooling Fan1 x Some Accessories