6Ft box track barn door hardware Only box rail barn door hardware for sale, door panel and handle are not included Material: steel; surface: smooth Black This kit can hold max door weight 300Lbs, can be used for both interior door and outside door Suitable for door panel thickness 1 1/2″ To 2″; the rollers vertical lock nuts are adjustable; the gap between door and wall is supper small, the box track need install on the wood board 6. 6Ft kit including: 6. 6Ft box track1; box track bracket2; roller2; stop2; end cap2; l guides.