1、120kg Maximum Bearing: The slide rail is made of 2mm thick high strength cold rolled steel plate. Even if carrying a weight of 120KG, it can keep your drawer stable and safe during full load push pull testing without damage. 2、Full Extension: Extendable from 400mm to 900mm, leaving enough space for installation to allow for space to spiral into the stairs. Moreover, due to the fully extended function of the slide rail, the drawer can be fully pulled out, making it easy to access and store the storage space of the entire drawer. 3、Good Workmanship: Due to the electrophoretic coating surface treatment, the slide rail has superior rust prevention and oxidation resistance. The interior is equipped with steel balls, which not only minimizes frictional resistance and makes sliding smoother and quieter, but also effectively increases the load bearing capacity of the slide rail. 4、Wide Application: Suitable for cabinets under stairs and any staircase cabinet, bringing more staircase storage space. It is also suitable for heavy duty drawers such as wine cabinets and wardrobes that require strong load bearing capacity. 5、Easy to Install: Comes with a compact size and a light weight as well, the drawer slide is very convenient to install within several minutes. 2 x Drawer Slide Item Type: Drawer SlideMaterial: Cold Rolled SteelApplicable Cabinet Depth: Approx. 420 ~ 600mm / 16.54 ~ 23.62inRail Installation Height: Approx. 53.8mm / 2.12inSuggested Cabinet Width: Approx. 400 ~ 600mm / 15.75 ~ 23.62inCabinet Height Should Not Exceeding: Approx. 2m / 6.56ftThe Gap on Both Sides of The Cabinet: Approx. 5mm / 0.2inLoad Bearing: Approx. ≤ 120 kg / 264.55 lb