Note: This product does not contain anti-slip tape! Excellent Quality: The main body of the sliding door floor guide is made of heavy-duty carbon steel for excellent strength and durability. The wheels are made of PA66 nylon for wear and heat resistance. Flat Bottom Design: The newly upgraded surface is smooth and the bottom is flush with the floor. To prevent the nuts from protruding or making the floor uneven, the grooves on the bottom are designed so that the retaining nuts fit perfectly. The door does not need slots and will not get stuck or damage your floors. Quiet and Scratch Resistant: High-quality bearings are used in the floor guide rails to ensure quiet and smooth sliding operation. The bearings are tested for up to 100,000 rotations. Protective strips are included and can be attached to the rollers to prevent friction that may damage the door or rollers. Adjustable Sliding Door Rollers: The roller guide is fully adjustable. The two small rollers are individually removable, allowing you to adjust the distance between them according to the thickness of the door. Wide Application: The matte black textured finish blends well with various flooring types and complements home decor. Suitable for use in apartments, bedrooms, hotels, warehouses, farms, garages, and other areas. Compatible with various door types, including barn doors, cabinets, fences, and kitchen doors.