12FT/144'' Box Rail Exterior Sliding Barn Door Hardware Kit for Double Door Aluminium Alloy Wall Mount, Heavy Duty, NO Door PanelCAPACITY OF THE KITSuitable for 2 door panel thickness 1" to 1 3 4". The 12FT kit suitable Max. door opening 68'',Max. door panel width 36". Weight capacity is up to 330lbs. SMOOTH AND QUIETSuper silently wheels which ensures rollers slide smoothly and quietly on the track, invisible sliding for overall aesthetics. The box rail barn door hardware fully cushioned at both ends to protect door and keep safety. HEAVY DUTY Our box rails barn door hardware