PERFECT DOOR PROTECTION: Both the top and outer rings of the doorstop bottom have a 6mm high elastic rubber ring, which can protect the door from walls and furniture without leaving any marks on the door. EASY INSTALLATION: There are two installation options for the bottom door stopper. According to the provided expansion screws, install the door stopper floor to tighten, which is extremely strong (if you have underfloor heating under the floor, you can install it on the wall). Or, on a clean floor, use 3M double-sided tape to attach the door stopper to fix the tape position. No screws or drilling are required to avoid damaging the floor. MEASUREMENTS: door stopper floor diameter 32mm, the height 45mm, the height of the rubber ring from the floor 25mm and the diameter of the 3M rubber base 55 mm Quality: The designed door stopper is made of high-quality stainless steel, high-quality soft rubber and stainless steel in the full circle to ensure the best cushioning quality Design: The sophisticated modern design is suitable for everyone place, any apartment house or office and can be mounted on the wall for aesthetic reasons