Features: These stoppers are made of strong flexible rubber and are made to last for many years to come. These heavy rubber jam with a unique hollow design provides for optimum friction to keep the door deadbolt. Protect your home or office floors with these abrasion-resistant door stoppers which won'for t slip or scratch even on those heavy duty Industrial doors. Keeping your kids, babies and pets safe from slamming doors. A clear-cut reinforced skirting around the stoppers and the enhanced hollow design which enables double stacking makes it hard for these wedges to topple. These sturdy non-slip door stoppers are made for wood, glass, and steel doors and they work well on floors like hardwood, carpet, concrete, tile, linoleum, stone, asphalt, and ceramic providing superior clench. These door stoppers allow you to move freely in between rooms of your home, school, or office, without having to open and close your doors every single for time. Specifications: Material: ABS Size:13X5cm/5.1x2.0 inches Color：Brown/White/Black Package Includes: 1 Piece Rubber Door Stopper. note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.