Appearance: make of sturdy steel to prevent damage.Aluminium alloy material, bright black appearance,can be use for ISUP skateboard snowboard kayak longboard shorboard et. Design elements: U-shaped opening design, can store most of the board, hanging type assembly, easy to disassemble and hide Easy to install with expansion bolt and screw, it can be installed quickly with small electric drill Color: Black Material: metal Package Contents: 1Pair Surfboard Rack With(screws and drywall anchors) Only the above package content, other products are not included. Note: Light reflection 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.