【Durable and Strong】 Drawer runners are made of 1mm high-quality Q235 cold-rolled steel, width: 45mm, hold 100 pounds, 40 pounds more than regular runners. 【Double anti-rust】Surface electrophoresis treatment. The electrophoretic layer prevents air from directly contacting the rail steel plate, proving its durability in over 50,000 opening and closing tests. 【Side Mount Drawer Runners】Mounting screws included. Length: 200mm(8 inch). The pull-out length of the drawer slides is equal to the closed length, 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: 12.7mm~13mm(Each). 【Multiple Sizes】The drawer runners are available in 200 250 300 350 400 450 500 550 600mm, runners for wardrobe drawers, kitchen cabinet drawers etc. 【Ball Bearing Drawer slides & Detachable 】 Solid steel ball to ensure smooth opening and closing of the slides.The inner rail can be detached by pressing the buckle for easy installation.The rear end of the slide rail is equipped with a rubber mute pad, and the noise is as low as 35 decibels.