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, and 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 and the door does not need slots and will not get stuck or damage your beautiful floors. Quiet and Scratch Resistant: We use high-quality bearings in the floor guide rails so you can enjoy quiet and smooth sliding every time, with the bearings rotating up to 100,000 times. It comes with protective strips that you can attach to the rollers to prevent friction when sliding from damaging the door and rollers. Adjustable Sliding Door Rollers: The roller guide is fully adjustable, and the 2 small rollers are individually removable so you can adjust the distance between the two rollers according to the thickness of the door. Wide Application: The matte black textured appearance with good flooring perfectly matches your home style and allows you to use it in various scenarios such as apartments, bedrooms, hotels, warehouses, farms, garages, etc. Suitable for all types of doors, including barn doors, cabinets, fences, kitchens, etc.