Feature: 1. COLD ROLLED STEEL: The drawer slide rail is made of 2mm thick cold rolled steel, with high density and thickness, good impact resistance, and can bear 120KG of heavy objects, ensuring stable and safe sliding of the drawer, and long service life. 2. FULL EXTENSION: The length of the slide rail is 400mm, with a fully extended length of 700mm, leaving sufficient space. During installation, space is reserved for screwing into the stairs, the fully extended function allows the drawer to be fully pulled out. 3. STABLE SLIDING: With a special electrophoretic coating finish, this slide rail has good rust and oxidation resistance, and equipped with industrial grade solid steel balls inside, minimizing friction and making sliding smoother and quieter. 4. APPLICABLE CABINET: This slide rail is suitable for cabinets and any staircase cabinets under stairs, as well as heavy duty drawers such as wine cabinets and wardrobes that require strong load bearing capacity, easy to install and use. 5. APPLICABLE SIZE: The rail installation height is 53.8mm, suitable for 420‑600mm cabinet depth and 400‑600mm cabinet width, the cabinet height does not exceed 2 meters and has a wide range of applications. Specification: Item Type: Drawer Slide Rails Material: Cold Rolled Steel Suitable Cabinet Depth: Approx. 420-600mm / 16.5-23.6in Rail Installation Height: Approx. 53.8mm / 2.1in Suggested Cabinet Width: Approx. 400-600mm / 15.7-23.6in Cabinet Height: No more than 2 meter / 6.6ft Both Sides Cabinet Gap: Approx. 5mm / 0.2in Load Bearing: Approx. ≤120KG / 264.5LB Slide Rail Length: Approx. 400-700mm / 15.7-27.6in. Package List: 2 x Slide Rails Note: 1. Screws are not included. The customer needs to match the screws with the corresponding length according to the thickness of the mounting plate, suitable for self tapping screws.2. There is a slight error in size.