3 sections telescopic design , ball bearing movement, side mount. Soft close mechanism adds a concealed piston to slowly draw the drawer smoothly and silently closed. Preventing drawers from slamming shut, stopping damages to drawers and keeping items from shifting within the drawers. Quad ball bearing and triple slide construction produce outstanding full extension performance. Cushioned feature for pick-up noise reduction. Used in Office furniture, Cabinets, Closets, Kitchens. The drawer length should be below or equal to 285mm.