Trixie's plastic door for our flat roof dog houses will help keep your canine companion warm and dry. It is compatible with our extra-large dog house model number 39553, as well as many other standard size brands. The heavy duty plastic flaps are vertical and transparent, making it easy for your pet to enter and exit while keeping out the harsh elements. Simply screw the door into the top of the interior door frame for quick and easy installation. Screws included. Color clear plastic. Dimensions 13 by 20-Inch.