Specification9cm x 4cm, height is 3mm-90mm; 44 gram light weight,Pack of 6 wedges,Black. Non-Slip Design: The door stops of are made of soft silicone, designed with a grooved bottom surface, to keep doors firmly in place and prevent them from closing by slipping or sliding. Height Adjustable: 6 door stops can be stacked together to fit maximum gaps of up to 90mm, 1 door stopper could at minimum gaps of 3 mm.PLEAZE measure the height from the bottom of your door to the floor before buying! Safe, Eco-Friendly and Durable:Door stoppers are non-toxic, odorless, door stoppers are made of rubber from superior silicone to confirm for safe use. Universal Application:Can be easily inserted into door gaps,Suitable for all surfaces, carpets, concrete, tiles and wood. wood, metal doors, glass doors etc. Product Description Door Stoppers Rubber door stops have the good contact with the residential floors and wedges securely under interior and exterior doors for a secure grip. All of our doorstops are sloped to prevent doors from closing on their own. They fit in most door gaps if you double them back to back, and will stand up to daily use without cracking Perfect Size One Perfect Size - Every Doorstop measures 3.74" (L) X 1.57" (W) X 0.78" (H). doors of different heights.Keep your door firmly stuck in the door stopper Anti-slip particles Our doorstops are designed with anti-slip particles, which effectively prevent the door stopper to slip Anti-torsion Our 100% natural rubber is a perfect hybrid of flexibility and firmness.They are built to withstand hard knocks and are made to last for years