Non-scratching and anti-slip: these door stoppers are made of flexible rubber, no more scratches on your floors; Sloped design and anti-slip striated base provide better frictional force and gripping power Good for rough : soft rubber door stop can be placed on the wood, cement, tiles and carpet; Relatively rough will be better Suitable placement area: these door stopper will fit the area under any of your doors putting anywhere 2.5 cm off the floor; When the distance is more than 2.5 cm, you can stack them up to apply Application: can as a helpful tool to prevent the door/ windows slamming, slipping or sliding; Fit for windows, metal door, glass door, wood door, self-closing door, household doors and so on Applying them to open the window and door every day for efficient ventilation, and keeping health family or colleagues in the home and office. Material: rubber Color: black Length: 10.3 cm Width: 2.8 cm Height: 2.5 cm Package Contents: 4 * door stop wedges Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.