Load-bearing capacity: 100 LB. Capacity 66,000 cycles ※ Soft Close: The drawer slides equipped hydraulic damper which allows the slides achieve soft close effect. Double spring design make less noise when close and open, create a warm and quiet family environment for you.※ Material ：Drawer slides are made of high grade cold-rolled steel with zinc plated finish, heavy-duty and durable, load-bearing. Solid ball bearing ensure sooth opening and closing, can serve you many years. You would feel the quality when you receive.※ Double Anti-drop: Drawer slides have double anti-drop function. It would prevent drawer separate from cabinets. Easy to take down and clean.※ Measurements: Length:12inch(305mm); Width:1.77inch(45mm); Thickness: 1/2inch(12.7mm); Length:14inch(355mm); Width:1.77inch(45mm); Thickness: 1/2inch(12.7mm); Length:16inch(406mm); Width:1.77inch(45mm); Thickness: 1/2inch(12.7mm)； Length:18inch(458mm); Width:1.77inch(45mm); Thickness: 1/2inch(12.7mm); Length:20inch(500mm); Width:1.77inch(45mm); Thickness: 1/2inch(12.7mm);※ Excellent After-Sale Service: We focus on quality and after-service. If you find any quality problem on our drawer sides, please feel free to contact us, we promise solve it until you are satisfied. Replacements or other solutions would be provided for you. NOTE:screw NOT INCLUDEDPlease choose the right size before you purchase