Maximum door thickness 1-3/8", maximum door weight 200 lbs. track lengths available are 72", 96", 106", 144". The 100BP is one of the finest heavy duty sliding bypass pocket door hardware systems made. Ideal for residential/commercial applications where quality, trouble-free operation and long life is a necessity. The 100BP features trackless door guides that eliminate the need for bottom guide tracks. The heavy gauge 6063T6 precision extruded aluminum track with convex rails is made to the most precise specification. Guaranteed jump proof smooth rolling tricycle ball bearing hangers.14 – 16 gauge zinc trivalent plated steel parts. Sets include all necessary hardware less door, trim and material to construct pocket door cavity. Installer to construct pocket cavity and track header as indicated in 100BP installation instructions. Track can be cut down to fit any smaller size openings. Specify door thickness when ordering. Hardware Sets are configured for standard 1-3/8" [35mm], 1-3/4" [44mm] or 2-1/4" [57mm] door thickness, non-standard door thickness installations possible by offsetting the routed door guide groove proportional to door thickness. IN10BPPD