Solid steel, black powder-coated surface, anti-rust, anti-corrosion ensure years of beauty and longevity.

Fit for door panel with thickness of 1-3/8 to 1-3/4 inch.

The distance from the top of the door to the ceiling should be at least 9 inch

The track length should be at least the total width of the doors or equal the opening

All tracks are pre-drilled holes, the spacing between each hole is American standard 16''.

Tracks 7.5ft and under are one complete track, 8ft and above are connected by multiple shorter tracks

There are connection holes to expand the track at the end of both sides, therefore, the spacing between the holes in the connecting section may not be 16''

Packing list：Track; Roller; Bracket；Spacer；Floor guide；Anti-jump pads；Door stopper；Connector.