Strong and Durable: Heavy-duty door stopper made of stainless steel with an electroplating process and durable rubber. The metal doorstop has a nice finish, is waterproof and rust-proof, and offers strength and durability. It is a heavy-duty product and sturdy enough for any heavy-duty door. Adhesion & Non-slip: Door stoppers for the bottom of doors do not slide because there is rubber on both the top and bottom of this wedge. The rubber provides a firm grip on the floor and door without budging. The door will not move even with gusts of wind. Adjustable Design: Door wedge stopper, spring-loaded door stop can adjust height to fit any door space from 1 inch to 3 inches. Most doorstops are too short and the door easily slides over them, but this adjustable door stopper is tall enough and works perfectly. Excellent Door Stop: Large door stopper suitable for any heavy commercial swinging door, metal door, double doors, safety door, self-closing hinged door, and balcony doors with more space underneath. It also works well on glass doors, carpet, parquet, or tile and performs fantastic. Safe and Sturdy: Door stoppers automatically adjust to the space and are great for commercial, residential, garage, corporate, public places, schools, and keeping every heavy door open, preventing it from blowing shut in the wind. Color: Black + Silver Material: Stainless Steel Size: 13CM Package Contents: 1 x Door Stopper Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.