Premium Material: The door stopper for wall is made from high quality aluminium alloy with a silicone head. It's tough, rustproof, and fade resistant. It protects door handles and walls well, providing a reliable long-term solution Spring Shock Absorption Technology: Protecting the wall and ensuring a quiet, safe space for you, the black door stops feature advanced spring damping, which gently absorbs the noise and impact of the door opening and closing Two Installation Choices: You can either use adhesive for sticking or screws for fixing. Adhesive installation won't damage the wall; use screws for walls not suitable for adhesives. It's up to you to pick the one that suits your needs Specification: Our wall protectors from door knobs weigh 0.096lbs, 1.65 inches in diameter at the bottom, 1.26 inches in diameter at the top, 1.04 inches in height, suitable for bedrooms, offices, bathrooms, kitchens, refrigerators and so on Modern Appearance: The door knob wall protector is designed in black, with clean and smooth lines, giving a modern, stylish feeling, which can enhance the overall aesthetics, suitable for a variety of modern architecture and home decoration styles Door stopper wall protectors with silicone heads and aluminium doorknob wall protectors with spring shock absorption technology