DN 80 PL 4 Folding System for 4 heavy doors. Load Cap: 88 lbs/door. Ultra smooth and quiet ball bearing rollers. For doors up to 29-1/2". Min. Door thickness: 13/16". Set for 4 Panels.

FOR USE WITH U21 TOP TRACKS, ex. 021U211

FOR BOTTOM TRACK: 10100608020, 6.5' OR