Bypass Sliding Barn Door Hardware KitDouble Track Bypass Barn door double track bypass hardware kit is low ceiling design, only need 9 inch ceiling space from top of the door to ceiling; double track bypass hardware kit offer a smart solution than the single track bypass, double track can let each barn door slide? on each track where you want, they will not have too much overlap between, it can let your openings show maximum display in the same length track, the two barn doors slide