Small and light aluminum alloy materialHigh hardness, metallic , not easy to rust, lightweight and durable aluminum alloy material is more conducive to heat dissipationThe Aluminum Case the metal shell is more conducive to heat dissipation, and comprehensively protects your motherboard.Full package and full protection After repeated testing, each hole is highly matched to the motherboard, and the protection is more thoughtfulPerfect suitable for Banana Pi M2 Zero board , all interfaces is accessed.Colour:blackMaterial:Aluminum alloySize: 65 x 30 x 15MMPackage Contents:1 x Aluminum Alloy Cover1 x Aluminum Alloy Bottom Plate1 Set x Screw Accessories1 x Pin Header1 x Thermal Pad1 x Usb Cable1 x -Compatible AdapterOnly the above package content, other products are not included.Note:Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.