Strong and Durable: Heavy-duty door stopper made of stainless steel with electroplating process and durable rubber. Features a smooth metal finish, waterproof and rust-proof, strong and long-lasting. This heavy-duty product is sturdy enough for any heavy door. Adhesion and Non-Slip: Door stoppers for the bottom of doors do not slide, as there is rubber on both the top and bottom of this compact wedge. The rubber provides a firm grip on floor and door without moving. The door remains secure even with strong gusts of wind. Adjustable Design: Door wedge stopper with spring-loaded mechanism adjusts to fit any door gap from ½ inch to 3 inches. Unlike standard doorstops that are too short, this adjustable stopper is tall enough to work effectively. Excellent Door Stop: Large door stopper suitable for heavy commercial swinging doors, metal doors, double doors, safety doors, self-closing hinged doors, and balcony doors with larger gaps underneath. Also compatible with glass doors, carpet, parquet, and tile floors. Performs reliably on various surfaces. Safe and Sturdy: Door stopper automatically adjusts to the gap, ideal for commercial, residential, garage, corporate, public spaces, and schools. Holds heavy doors open and prevents them from closing due to wind. Color: Black + Silver Material: Stainless Steel Size: 13 cm Package Contents: 1 x Door Stopper Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.