Non-Slip Design: Door stops are made of soft silicone, designed with a grooved bottom surface, to keep doors firmly in place and prevent them from sliding or sliding closed.Adjustable Height: 4 door stops can be stacked together to fit maximum gaps of up to 60 mm, 1 door stop could fit minimum gaps of 2 mm. PLEASE measure the height from the bottom of your door to the floor before purchasing!Safe, Eco-Friendly and Durable: Door stops are non-toxic, odorless, door stoppers are made of superior silicone rubber to confirm for safe use.Universal Application: Can be easily inserted into the gap of doors, Suitable for all surfaces, carpets, concrete, tiles and wood. Wooden doors, metal doors, glass doors etc.Number of pieces delivered: 4Color: GraySize: 2*9.4*4cmWelcome to meet