It is larger type than other rubber door stop on the market, more solid and stronger adhesion. Works well for both small and large door gaps. STRONG & FLEXIBLE RUBBER: Door stoppers for floor is made of flexible natural rubber, non toxic, not easily deformed, durable and sturdy. The combination of flexibility and sturdiness ensures a tight fit between door wedge rubber and the door gaps to hold the door firmly. Its a great solution for keeping the door open for fresh air circulation. ANTI-SLIP BASE: Door wedge black with a stepped hollow base that enhances grip with the ground, making door wedge heavy duty hard to tip over, and even with the strongest gusts of wind without budging. It prevents your children, babies, pets from being at risk by any accidentally closing the door. PORTABLE DOOR STOP: Rubber door stopper is movable,making it easy to carry and store. Use them - no marks, no scratches, no scuffs, Suitable for stopping garden fence panels from rattling, industrial, commercial use, residential, home, office, school, garage, patio, kitchen, hosiptal, cottage, etc. EFFECTIVE & SERVICE: Doorstops wedge works well on floors such as hardwood, carpet, cement, concrete, tile, ceramic, etc. We are confident in our door wedge rubber black, any issues or dissatisfaction with your purchase, Please keep in touch with us.We will give you a solution!