Carpet stoppers come in two different sizes. 130 x 25mm x 8pcs and 180 x 30mm x 8pcs. Both are thick and suitable for almost all types and shapes of carpet. Perfect for indoor and outdoor use. One side with white paper protective film is stuck on the carpet. The other side with the word "on the floor" is glued to the floor. If you want to remove or clean it, simply unscrew it from the floor by slowly lifting it up. Non-slip carpet pads are made of high quality reusable PU gel with no odor. If it gets dirty, simply wash the rug grab with soap and water and allow to air dry. It leaves no residue on your precious floors. Carpet grabs are made of soft PU material that will not damage floors. The sticky surface leaves no residue on the floor after removing and also works on hard floors such as tile, ceramic, hardwood, laminate, etc. Carpet gripper material is PU elastomer, high temperature resistance, environmentally friendly, no deformation, easy to restore. If the viscosity of the carpet gripper is weakened by dust, it only needs to be cleaned with clean water and will become sticky after drying.