Features 1,Screw hole-can adjusted the height to install 2,Solid ball - smoother, more balance and quiet 3,Slip pad - effectively reduces the damage caused by switch collisions 4, material - study ans durable 5,Multi-layer plating - the polishing plating of surface has good oxidation resistance, is not easy to rust, beautiful and practical Specification Features: 1. Screw hole-can adjusted the height to install 2. Solid ball - smoother, more balance and quiet 3. Slip pad - effectively reduces the damage caused by switch collisions 4. material - study ans durable 5. Multi-layer plating - the polishing plating of surface has good oxidation resistance, is not easy to rust, beautiful and practical Specification: Condition: Material: Cold Rolled Steel Optional Color: White, Black Size: Approx. 356 x 32.5mm or 14.0 x 1.3in Package List: 2 x Keyboard Rails 1 Set of Screws Note: 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 Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.