Please check the size in detail before purchasing, if you encounter any problems, please contact us in time! Specification Product nameblack steel silent three-section slide MaterialCold rolled steel Installation methodSide installation Bearing capacity20KG Material thickness1.0MM Scope of usecomputer desks, desks, household drawers Package list: Drawer Rail*2pcs 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! Material:Made from premium zinc plated cold rolled steel. Two section drawer slide offer 20 kg Load-bearing capacity. Type: 4in , 5in , 6in , 8in Silver Full Extension Telescopic Metal Ball Bearing Keyboard Adjustable Hanging Suspension Track Rail. Steel ball-bearing action that offer less noise at closing and opening. This feature can make your furniture smooth movements with nice and soft stops and prevent your baby from pinching noise. Soft close drawer slides are ideal for cabinetry, desk pedestals and general storage drawers. Side mounted Steel ball-bearing action, non handed close design, active stop, Internal rail separation is simple and easy to install and remove drawer. Anti rust and ant corrosion: drawer runners are treated with electroplated blue zinc plating. The electroplated layer can prevent direct contact between the air and the track steel plate, thereby resisting oxidation and corrosion