Part # 016.SET.42.22 Rack and Pinion Pocket Door System with 21.65" slides and 18.4" of travel. Accommodates doors that are 44" high x 24" wide and up to 30lb. Kits include all hardware needed for one door with inset hinges for doors up to 7/8" thick. Thick door inset hinges and overlay hinges are sold separately.