1. Material: Metal keyboard slide made of 1.5 mm thick steel plate with galvanized surface, wearresistant, sturdy, and stable. Package includes: 1 pair of keyboard slides, fixing screws, and a screwdriver. 2. Size: Length: 30 cm/35 cm/40 cm, width: 35 mm, thickness: 10 mm, with adjustable height settings to meet different users' keyboard height preferences. 3. Wide application: This set of keyboard slides is stable and resistant to shaking. Suitable for computer keyboard drawers, cabinet drawers, kitchen drawers, electronic organs, sliding rails, and DIY sliding keyboard trays. 4. Drawer slides with ball bearings: Equipped with doublerow solid steel ball bearings, ensuring quiet, smooth, and effortless operation.