Quantity : 4 pieces Color: silver Made of stainless steel, it is strong, sturdy and rust resistant. No worries, just like any other rubber stopper. Install them with tape or screws for the inner door and screws for the outer door. Install the door stopper with screws, the long part of the bottom plate does not need to be installed. Its base can be unscrewed. But the short part of the bottom plate should be installed Protect your door from damage: Strong enough to withstand door impact, reduce padding and perfectly protect your door from damage, wear and tear. In addition, thanks to the padding of the rubber ring, the door will be quieter when opening and closing. Protect your loved ones: ideal for families with children or pets. Eco-friendly, no pungent smell, safe for your kids, pets and family. Whether stopping side doors, wide doors, kitchen, bedroom, home or office doors, or keeping windows open, this large door stopper kit has many uses. EASY TO INSTALL: The door stopper is very easy to install, just use the screws to mount the round base to the floor and screw the door stopper. Adhesive backing can also be used to avoid drilling holes and make installation more convenient. Complete mounting kits: We will provide you with a complete set of mounting kits as well as door stops. The way to install the door stopper, punch installation or free punch installation depends on your actual needs.