Load : Supports up to 88 lbs (40 kg) for -duty use. Material and Construction: Made from high-grade cold rolled steel with zinc plating for durability and corrosion resistance. Concealed Undermount Design: Slides are mounted beneath the drawer for a clean appearance and space utilization. Soft Close Mechanism: Integrated hydraulic buffer ensures drawers close gently and silently. 【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., Manufacturer: IMGASDCSD