Product description: F-XW has been committed to providing sturdy and durable hardware for your home and kitchen to achieve a better life. The sturdy cold-rolled steel material allows it to withstand loads up to 88lb/40kg without losing function. Ball bearing + unique bilateral spring symmetrical design, so that allow your drawers to glide smoothly and quietly every time you open or close. Suitable for Mechanical Cabinets, Warehouse Cabinets, Industrial Cabinets, Van/Truck Drawers, Sliding Door/Windows/Furniture. Features: - Stronger Ball Bearing - 3-Fold Completely Full Extension Slides - 50,000 times push-pull tests without damage - Push to open style which do not need a drawer handle Specification: - Material: Cold-Rolled Steel - Installation Method: Side Mount - Width: 45mm/1.8inches - Color: Black - Finish: Zinc plated electrophoretic - Ball bearing material: solid stainless steel - Load bearing (pair): 88lb (40kg) - Depth Of Cabinet: Drawer Length + 0.12in / 3mm How to choose the slide? Measure the depth of the drawer. For example, if the drawer depth is 28cm/11in, you can choose a slide rail of 25cm/10in (a difference of 2-3cm is appropriate). Package: 2 Pair of drawer slide The mounting brackets and screws are not included.