Features 1. Mechanical door stopper: Unlike traditional magnetic door stoppers, this door stopper adopts mechanical instant locking technology, which can stably and firmly grasp your door. The built-in spring damping can buffer the impact and prevent damage. 2. Provide safety for your loved one: Children's hands are often caught inside the door, and this door stopper is the perfect solution to keep the door open. It not only prevents wind, but also prevents the door from being abruptly closed by children or pets. Very suitable for families with children or pets. 3. Adjustable height: The length of the door stopper touch rod can be adjusted, and the adjustable height of the door gap is 20mm/0.78 inches. It can also be installed on narrow door frames and is suitable for various doors, including heavy-duty doors. 4. Extremely durable: The door stopper is made of high-quality zinc alloy material and colored with electroplating technology, which is durable, sturdy, and easy to maintain. 5. Installation and service: Two installation methods: easy installation with strong double-sided tape or secure installation with screws. (Comes with 3m adhesive and nail free adhesive) Specification Material: Alloy Color: Black, Yellow, Silvery, White Size: 16 x 9.5 x 3 cm Weight: 250 g Package Include: 1x Punch-Free Mechanical Silent Floor Door Stop