Specification: Max load: 45.0kg Drive type: Ball Material: Rubber 【High-Quality Material】These drawer slides are made of high-quality cold-rolled steel. Each drawer slide is 14mm thick. They've undergone 100,000 push and pull tests without damage. 【Easy Installation】The full extension drawer slides feature strong ball bearings and are easy to install. Mounting screws are included. The drawer rails have a maximum load capacity of 45 kg. 【Smart Design】Rubber stoppers on the drawer rails prevent automatic opening. You need to press a button to open or close the drawer. The drawer slides lock when fully extended or closed, keeping your drawers stable and secure. 【Scope of Application】The drawer slides use high-quality ball bearings. The drawer rail systems are suitable for mechanical cabinets, storage cabinets, industrial cabinets, cabinet/truck drawers, sliding doors/windows/furniture. 【Quality Guarantee】Our drawer slides provide you with 100% quality assurance. If you have any questions, please do not hesitate to contact us. We will get back to you within 24 hours.