Magnador Hinge Pin Set Flap Size:Small you can consider this cat

you can consider this cat door with a built in lock

Double flap maximizes insulation value

Adjustable widths to fit most sash windows (vertical sliding windows)

except that these parts not normally needed for a kennel application have been excluded:

Magnador Hinge Pin Set Flap Size:Small you can consider this catReplacement hinge pins for Magnador pet doors Order the small size for the Mini (small) and Mag I (medium) models Order the large size for the Mag II (large) models Comes in a pack of two pet door hinges The Magnador dog door hinge pin set comes with two pins. The pins are available in small and large sizes. These pins will only work for Magnador hinged dog doors, and are not meant for any other brand. The small size fits the Mini (small) and Mag I