Specification Product: keyboard support drawer slide Material: cold rolled steel Color: Black Installation methods: Hanging installation Product size: width = 35 mm / 1.4 inches, closed length:240 mm / 10 inches,290 mm / 12 inches Pull out total length: 480 mm / 19 inches,578mm / 23 inches; Professional applications: computer desk keyboard support rails in offices and homes. Sliding desk drawer for keyboard placement, DIY hanging drawer assembly. Package content: 2 x Keyboard Slides , with screws, Used to instal 1 keyboard tray About size: 1-2mm error may exist due to different sizes Note: Due to manual measurement, there may be an error of 1-3mm, please understand! The product may have slight chromatic aberration due to the shooting light, angle, and different displays. Please understand! 3 FOLD extension slides: can be extended in 3 sections, with extra-long sliding space to open the entire keyboard tray or drawer completely. Ideal for homes, kitchens, offices, garages, cabinets and furniture. Smooth and quiet sliding: telescopic slides with ball bearings provide smooth, frictionless movement, making drawers slide very smoothly and easy to pull out. Rust and wear resistants: made of highquality cold rolled steel with high hardness and black baked enamel surface, not easy to rust and corrode, beautiful and practical. Load-bearing capacity up to 40kg per pair Quick installation and removal: you can complete removal by pressing the removal lever by hand. Easy to install. Fastened with screws. Widely Used: This metal drawer slide can be applied to your desk, computer keyboard tray and drawer, cabinet, furniture, kitchen and garage.