No tape, adhesive, glue. The backing has non-slip adhesive. Brakki bullnose carpet stair treads can be firmly stuck to the stair floor, and its back has a non-slip function to prevent the stair mats from moving when walking. Our stair treads protect your stairs from everyday scratches and wear. Don't worry about it damaging your hardwood floor, there will be no residue after installation. [Edging Stair Protectors]: Our non slip stair treads is superior to most products on the market, and its advantage is that it can protect the edges of the stairs, which is a function that many products don?t have. The edge of the staircase is the most prone to wear, and installing this stair mat can save you from trouble. The protection of stairs is also to protect pets and family, you will not feel pain if hit the edge accidentally. [Easy to Clean]: We use high-quality fiber materials that is not easy to dust and very easy to clean. You can use a vacuum cleaner to remove debris from the surface of the stair carpet. You can also take the stair treads off and wash them, hand wash them in cold water with a mild detergent, let dry, and then reattach them to the stairs. [Easy to Install]: It takes 20 minutes to install manually. The first step before installation is to clean the stairs and make sure the floor is dry. The second step is to remove the transparent film on the back of the stair tread. The third step, put the stair mat in the center of the wooden step, and firmly press down, the non-slip adhesive back will be fixed on the stairs. [Multiple Use]: Size: 29.5?Lx9.5?Wx1.5?H The size of stair covers suitable for most homes. It is suitable for smooth marble steps, wood steps, brick steps and other hard and smooth stair surfaces to decorate your stairs more beautiful and reduce the noise that generated by going up and down the stair.