Strong and Durable: Heavy-duty door stopper made of stainless steel with electroplating process and durable rubber. Features a nice finish, waterproof and rust-proof, strong and long-lasting. Sturdy enough for heavy-duty doors. Adhesion and Non-Slip: Door stopper for bottom of door does not slide, with rubber on both top and bottom. Rubber provides a firm grip on floor and door without moving. Holds door securely, even in strong winds. Adjustable Design: Spring-loaded door stopper with adjustable height fits door gaps from 1 inch to 3 inches. Solves the problem of short doorstops that allow doors to slide over. Excellent Door Stop: Large door stopper suitable for commercial swinging doors, metal doors, double doors, safety doors, self-closing hinged doors, and balcony doors with larger gaps. Also works well on glass doors, carpet, parquet, and tile. Safe and Sturdy: Automatically adjusts to gap size. Ideal for commercial, residential, garage, corporate, public spaces, and schools. Keeps heavy doors securely 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 variation from the image. Measurement may vary by +/- 1-3 cm.