1. Aluminum alloy material, sturdy and durable, gift good protection, with passive cooling function. 2. With silicone themally conductive pad of CPU and RAM, do not worry about overheating 3. Reserve all interfaces, assist set up OPI Zero Inteface HAT 4. Simple and compact design, clean to put in Colour:black Material:aluminum alloy Package Contents: 1x Aluminum Case Kit Only the above package content, diverse merchandise are usually not included. Note: Light reflection and assorted displays may cause the colour of the item within the photograph somewhat different from the real thing. The measurement allowed error is +/- 1-3cm.