Amazon.com : Wundermax Door Stoppers - Pack of 3 Rubber Door Wedge for Carpet, Hardwood, Concrete and Tile - Home Improvement Accessories - Gray : Office Products
5-Pack (Same Size) Solid Rubber Stoppers - Size #8-42mm (1.65in) x 32mm (1.25in) - 30mm (1.18in) Long - Black Lab Plug: Amazon.com: Industrial & Scientific