It's a sturdy, durable product. Our door stoppers are made of a strong zinc alloy and rubber. This is very important to provide the weight of the supporting door. It will serve your family for a long time. Metal door stoppers are made of a strong zinc alloy and rubber are specially treated to give the item an old or rusty appearance while protecting the item from rust and wear. Features -Color:Black-Material:Zinc alloy, rubber-Size:11.00X2.50X2.50cm/4.32X0.98X0.98in-Protect walls and doors, soft rubber tips effectively mitigate the sound of slamming doors. - Door stoppers are designed to prevent damage to doors and walls and create a warm home for your family. - Rugged design, zinc alloy construction ensures quality and longevity. Can serve you for a long time. - The classic retro style look can be used in any style of home decoration. Meet your different needs. - Easy to install, simply mark a spot and stop the door in the right place and ready to go. Packing list: 4 x door stopper