HIGH QUALITY High quality material: Door stops made of PVC, non-toxic material, durable like plastic and flexible like rubber, which makes it better fit the door handle and have a perfect shock absorption effect.Easy to install: No tedious drilling or screwing required, these silicone bumper grommets can be mounted in seconds on the door and window handles of your home. Interior or exterior installation thanks to good resistance to atmospheric agents. No tools are required, just slide them onto the handle and you're done!Anti-noise door and wall protection, damage prevention: The door knob bumper bounces off the wall when you push the door, avoid damaging the wall and completely eliminate the slamming noise with these door knob bumpers, your frames and walls will be safe. and free from scratches.INVISIBLE COMPATIBLE SIZE: The size is 3 x 2.2 x 1.2 cm, the inner diameter is about 1.6 to 1.7 cm. It can also be slightly stretched. Being transparent they will be well camouflaged.