Features Adjustable Screw Hole Design: Easily adjust the height for convenient installation. Smooth and Quiet : Equipped with solid ball for smoother, more balanced, and quiet movement. Collision Damage Reduction: Slip pad effectively reduces damage caused by switch collisions. High-Quality Material: Crafted from sturdy and thickened cold rolled steel for long-lasting use. -Resistant Plating: Multi-layer polishing plating provides excellent oxidation resistance, preventing and ensuring a beautiful and practical finish. Specification: Condition: 100% Material: Cold Rolled Steel Optional Color: White, Black Size: Approx. 356 x 32.5mm / 14.0 x 1.3in Package List: 2 * 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