Strong and Durable: Heavy-duty door stopper made of stainless steel with electroplating process and durable rubber. The metal door stopper has a nice finish, is waterproof and rust-proof, strong and long-lasting. This heavy-duty product is 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 the floor and door without moving. The door remains secure even in strong winds. Adjustable Design: Door wedge stopper with spring-loaded mechanism adjusts to fit any door gap from 1 inch to 3 inches. Unlike most door stops that are too short, 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 flooring. Safe and Sturdy: Door stopper automatically adjusts to the space, 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 displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.