【Multiple Sizes & Heavy Duty Runners 】Heavy duty drawer runners are available in 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000mm, suitability for shelves, industrial drawers, toolboxes, RVs, trucks, etc. 【Side Mount Drawer Runner】Quantity: 1 Pair of 300mm(12 inch) heavy duty drawer runners without lock. Load capacity: 120 kg. 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: 19mm~19.5mm(Each). 【Rust Prevention & long service life】Made of Q235 cold rolled steel, 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 60,000 opening and closing tests. These AOLISHENG heavy duty drawer runners are built to last. 【Full Extension Ball Bearing Heavy Duty Runners 】Double rows of solid steel balls make the drawer open smoother and quieter. Rubber cushion, avoid pushing and pulling collision during use, firm and stable, and has better bearing capacity. Full extension drawer runners, so that the drawer can be fully drawn out, which is convenient for storing items. 【Without Lock and Removable】The without lock heavy duty drawer slides are designed with a removable snap, there is a plastic buckle on the back of the slide rail, which can easily remove the inner rail by pressing it.