1. Carpet stoppers come in two different sizes. 130 * 50mm * 16PCS. 2 mm thick and are suitable for almost all types and shapes of carpets. Perfect for indoor and outdoor use.2. [Easy installation and removal] - One side of white protective paper film is taped onto the carpet. The other side with the word "on floor" is glued to the floor. If you want to remove or clean it, simply unscrew it from the floor by slowly lifting it off.3. [Washable and Reusable] - Non-slip carpet cushions are made of high quality reusable PU gel with no odor. If it gets dirty, just wash the carpet grippers with soap and water and let it air dry. It leaves no residue on your precious floors!4. [Harmless to the floor] - Carpet grabs are made of soft PU material that does not damage the floor in any way. The sticky surface leaves no residue on the floor after removal and works well on hard floors including tile, ceramic, hardwood, laminate, etc.5. [High quality materials] -Carpet Grippers material is PU elastomer, high temperature resistance, environmentally friendly, no deformation, easy to restore. If the viscosity of the rug gripper is weakened by dust, it only needs to be cleaned with clean water and it will become sticky again after drying.