Features: _x000D_1. Screw hole-can adjusted the height to install _x000D_2. Solid ball - smoother, more balance and quiet _x000D_3. Slip pad - effectively reduces the damage caused by switch collisions _x000D_4. High quality material - study ans durable _x000D_5. Multi-layer plating - the polishing plating of surface has good oxidation resistance, is not easy to rust, beautiful and practical _x000D_ _x000D_Specification: _x000D_Condition: 100% Brand New _x000D_Material: Cold Rolled Steel _x000D_Optional Color: White, Black_x000D_Size: Approx. 356 x 32.5mm / 14.0 x 1.3in _x000D_ _x000D_Package List: _x000D_2 * Keyboard Rails _x000D_1 Set of Screws _x000D_ _x000D_Note: _x000D_Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard 1Screw hole-can adjusted the height to install 2Solid ball - smoother, more balance and quiet 3Slip pad - effectively reduces the damage caused by switch collisions 4High quality material - study ans durable 5Multi-layer plating - the polishing plating of surface has good oxidation resistance, is not easy to rust, beautiful and practical