Dogs quickly learn how to use these spring loaded, heavy guage aluminum dog doors. These doors are a must for kennels in colder climates. Easy to install. Available in Small and Medium. Measurements are taken from the flat portion of the door not including the lip.
Small 11"x11" (covers a 10.5"x10.5" hole or smaller)
Medium 15"x15" (covers a 14.5"x14.5" hole or smaller)
Large 17"x21" (covers a 16.5"x20.5" hole or smaller)
