Size: Length of rail: 6FT; Suitable thickness of wooden door panel: 1 3/8”-1 3/4”(35– 45mm); Maximum bearing: 130lbs(60kg). Easy Installation: The box rail structure is not complex and easy to understand, we also provide a detailed professional installation manual, it’s easy for you to install. Package Included: 1 x 6ft rail, 1x Decorative cover, 2 x rollers with soft close, 2 x door stopper, 2x End Caps, 1 x floor guide, 1x wrench. 2x allen key and all other necessary parts such as screws. Pleasing Design: The guide rail is of one section type, no need to splice. The pulley is hidden in the rail, after you assemble your door with our box rail, the door and rail look integrated, simple and beautiful. The box rail is made of commercial grade aluminum alloy and is equipped with a soft closing mechanism, it is quiet, soft and smooth when you open and close the door. We are reliable and qualified manufacture. Professional customer service team help you solve all problems in time.