Ideal Pet Products Ruff-Weather Pet Door Small Gray 5.56" x 9.06" x 13.37"

For pets 2 - 12 lbs. Flap size 5" x 9.25" Cutout size 6.5" x 11.25" Door thickness range 0.75" - 1.75" Wall kit thickness range 4.75" - 7.25" - sold separatelyYou may also like Ideal Plastic Dog Door, Gray, Super Large, 2.12"L x 17.93"W x 23.87H.