VADANIA is a reliable brand and supplier of home & kitchen hardware. Our mission has been uncompromising since our foundation creates and provides innovative hardware for your home and kitchen to enable better living. Featured metal ball bearings for quiet and comfortable closure and dark discrete color that blends into most drawers. Features Soft Close Hydraulic Soft/Self Close feature designed for preventing the drawer from slamming shut. Double Spring Design Makes it easier to pull back and smoother than a single spring when bearing load. If the depth of the drawer is 13in/330mm, choose 12 in/300mm drawer slides. Deviations of 0.7in/20mm-1in/3mm are suitable) High-Quality Plat High-tension cold-rolled steel plates, 100,000 times of 100lb push-pull tests without damage.