1. Rust Prevention and Long Service Life: Adopt 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. The service life of runners exceeds 30 years. 2. Side Mount Drawer Runner: Quantity: 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 clearance: 19.5mm (Each). 3. Full Extension Heavy Duty Drawer Runner: 2 mm high density thickened steel is used, which is firm and stable, and has bearing capacity. The carrying capacity can be as high as 120kg. 4. 3Fold Ball Bearing Full Extension Drawer Runners: So that the drawer can be fully drawn out, which is convenient for storing items. 5. Detachable and Smooth: There is a black plastic buckle on the back of the slide rail, and the drawer can be easily taken out by pressing it. Easy to install. Rubber cushion to avoid pushing and pulling collision during use. Double rows of solid steel balls make the drawer open smoother and quieter.