Roymelo 64″ Bifold Sliding Barn Door Hardware Track Kit, Side Mounted Black Roller, Smoothly and Quietly, Assembly Easy, Fit Four 15″ Bi-Folding Doors (Door Not Included). Made of black heavy-duty steel, it has the benefits of sturdy, durable, wear-resistant and corrosion-resiatant. The roller is a combination of high-quality bearings and nylon wheels, matched with 6mm thick track to improve the bearing capacity of the product. And it has undergone 120,000 tests to ensure quiet and smooth sliding. Different from the traditional hardware kit on the market, the folding door kit can greatly save you space. And the scope of application is wide, can be used in a variety of living occasions, such as living room, dining room, study, etc. Packing: 2x 2.7FT track, 4x roller, 4x roller rotating bracket, 2x roller fixator, 5x spacer, 6x hinge, 2x floor guide, 1x Sealing Strip. Fit Door Thickness: 1-3/8″1-3/4″(35mm45mm). [Friendly reminder: DOOR NOT INCLUDED]. The total width of the door panel plus 4 is the length of the track. We provide detailed Bi-Fold sliding barn door kit instructions with pictures and text, which can be intuitively installed by yourselves, saving the time and cost of finding an installation team for you. We have a professional customer service team 24 hours online to help you. If there is any problem about our products, please let us know and we will try our best to solve your problem.