Installation Conditions: This hidden door hardware and track roller set is suitable for door openings from 24″ to 28″, fits door thickness from 1-1/4″ to 1-3/4″ and weigh up to 132 lbs. Excellent Quality: Our magic door sliding system is made of high-quality aluminum material with premium nylon roller pulley, coated with silver surface, which ensure the features as corrosion, rust-resistant, durable. And maintains its beauty and longevity for many years. Package List: 1 x 31-3/4 Top Track, 1 x Top roller, 2 x Soft close mechanismX, 2 x End cap, 2 x Bottom wheel, 1 x Bottom track, 1 x Floor guide. All necessary parts are included. DOOR IS NOT INCLUDED. Product Advantage: Compared with traditional barn door hardware, top mount concealed barn door track is more private and can be used in a variety of living situations, such as kitchen, study, etc. 24 Hours Stand By: The package contains all accessories and one copy of step-by-step installation manual. You can also get professional support within 24 hours from our service team.