Features: * Thermal Plastic Elastomer, rubber seal closes gaps up to 3/4-inch at bottom of garage door to seal out air, moisture, and dust * Stays flexible to minus 40 degrees F * Seal insert is held in place with a sturdy aluminum extrusion fastened to bottom of door with screws * All fasteners are included for your convenience * Black * 18 foot length What"s In The Box: * MD Products 87668 18-Foot Aluminum and Rubber Garage Door Bottom, Black