SUPERIOR QUALITY: We specialized in sliding door and hardware for many years. Our barn door hardware is made of high quality carbon steel with nickel-plated surface. There is no need to worry about quality. You get what you pay for. DOOR WEIGHT CAPACITY:270 lb, fit door panel width: 36'', door thick 1 3/8" to 1 3/4".The track kit fits Wall Stud and Concrete Wall.. All nylon wheels have been tested beyond 100,000 rolls PACKAGE INCLUDED: 2x 3FT Rails(Easy to connect and install as a complete 6ft rail), 5x Rail Spacers, 2x Rollers, 2x Door Stops, 1x Floor Guide, 1x Hex Key; All other necessary hardware is included as you see in the pictures. （DOOR NOT INCLUDED.） VERY DETAILED INSTALLATION STEPS:We provide step-by-step graphic and text instruction. All measurements in inch. It is very easy for you to take a reference during the installation. SUPPORT: We are the manufacture of barn door hardware. We have a professional engineer team .If there is question or problem, pls let us know.We will try out best to serve you. JUBEST Satin Nickel Sliding Barn Door Hardware Kit Single Door Flat Track Kit Top Mounted Roller 6FT,Nickle Barn Door Track