CCJH 4FT-20FT Sliding Barn Door Hardware Kit Track For One/Two Wood Doors. Carbon steel roller, premium nylon roller wheel, Gcr15 roller bearing, high strength industrial grade sliding track, can easily support 330bls load-bearing. Adjustable roller bolts, fit door thickness from 1 3/16″ to 2″ (3cm-5cm), Spring door stops, reduce noise and soft close, Tenon design for rail connection, connect seamlessly and move smoothly. Complete barn door hardware kit, step by step instruction installation with detailed graphic description, enjoy a funny DIY installation process. This rustic hardware fits wooden & concrete wall, great for saving space and room decoration, widely used for kitchen, laundry room, bedroom, bathroom, office, study room, dressing room, closet, cabinet etc. T-shape Floor Guide: x1. T-shape Floor Guide: x2. How to Choose Track Size. Hang Single Door: Track’s length should be two times of door panel’s width. (If door width is 36, you will need 6FT Single Kit for one door). Hang Double Doors: Track’s length should be four times of door panel’s width. (If door width is 36, you will need 12FT Double Kit for two doors).