The Hettich KA 3320 24" heavy duty drawer slidesare a telescoping precision full extension slide for high loads, up to 500 lb. capacity, with cushioned in and out stops. Made of chromated steel, the runner and ball race form a single non-detachable unit. Smooth action and high side stability through precision formed guides. The ball bearing spacers are made of noise-absorbing plastic with hardened steel balls. 3/4" Installation Width - 3" Height. Tested Weight Capacity 390 lbs. @ 10,000 Cycles - 254 lbs. @ 75,000 Cycles. Cabinet member requires #10 Flat head countersunk screw. Drawer member requires #10 pan head screw. Screw length will vary depending on application. Use all screw holes to achieve full load rating. Price is per Pair screws not included. Manufactured by Hettich America, in Buford, GA, USA. Features &; Specifications of the Hettich KA 3320 24" Heavy Duty Drawer Slides