Strong and Durable: Heavy-duty door stopper made of stainless steel with electroplating process and rubber, this metal door stopper is waterproof and rust-proof, strong and sturdy enough for any heavy-duty door. Adhesion and Non-Slip: Door stoppers for the bottom of the door 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 will remain in place even with strong gusts of wind. Adjustable Design: Door wedge stopper with spring-loaded mechanism adjusts to fit door gaps from 1 inch to 3 inches. Most door stops are too short, allowing the door to slide over, but this adjustable door 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 works well with glass doors, carpet, parquet, or tile floors. Safe and Sturdy: Door stopper automatically adjusts to the gap, ideal for commercial, residential, garage, corporate, public places, and schools. Holds heavy doors open and prevents them from slamming shut 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.