Item Type: Case for Raspberry Pi 4B Material: Aluminium Alloy Product Size After Assembly: Approx. 9 x 6 x 3cm / 3.54 x 2.36 x 1.18in Application: For Raspberry Pi 4B. 1Protective Case: Compact in size and light in weight, providing complete protection and efficient cooling without affecting the operation. 2Quick Cooling: This housing made of premium aluminium alloy material has great thermal conductivity, suits perfectly for Raspberry Pi 4B. 3With Heatsink: The round vent hole on the front is in close contact with the on board for Raspberry Pi chip, no more overheating problem. 4Durable Using: Advanced manufacturing process has improved the quality of aluminium alloy, thus this durable casing is not easy to rust. 5Easy to Install: 10pcs screw are also included in the set to largely simplify the whole installation, which can be quickly finished.For Raspberry Pi 4B board is not included. 1 x Upper Case 1 x Lower Case 10 x Screw