0m,Fit Door Width : 3.8" Thick 2 Door Panel, with Smooth & Silent Pulley (I Shape)Durable Corrosion-Resistant Hardware330lbs Weight CapacityEffortless InstallationFlexible FitSilent Smooth Sliding PulleysGentle Pulleys: Protecting Your RailItem Model Number: 010-3.3 ft / 1.