Rust Prevention long service lifeAdopt electroplated blue zinc treatment. The electroplating layer prevents the air from directly contacting the track steel plate, thereby resisting oxidation and corrosion.Passed more than 100000 opening and closing tests,They are durable and the normal service life of runners exceeds 30 years Side Mount Drawer RunnerQuantity: 1 pair(2-Pack) No screws .-Load bearing: 120 kg-Length: 450mm(18 inch).You can choose the size of the rails according to the depth of the drawer. *The length of the slide should be the length of the drawer.installation clearance19.5mm(Each). Full Extension Heavy Duty Drawer runner 2 mm high-density thickened steel is used, which is firm and stable, and has better bearing capacity. The carrying capacity can be as high as 120kg.3-Fold ball bearing full extension Drawer runners, so that the drawer can be fully drawn out, which is convenient for storing items. Detachable smoothThere is a black plastic buckle on the back of the slide rail, and the drawer can be easily taken out by pressing itEasy to install.rubber cushion cushion, avoid pushing and pulling collision during use, double rows of solid steel balls make the drawer open smoother and quieter.