Endura Flap Pet Door for Thick Walls Flap Size:Small Spring-loaded design allows for installation

Spring-loaded design allows for installation and removal in seconds

simple installation in aluminum-frame sliding doors

Fits tracks 28" - 48" (with patio insert installed)

Locks with your existing sliding glass door lock

which is common among other patio panels

Endura Flap Pet Door for Thick Walls Flap Size:Small Spring-loaded design allows for installationPet door for walls installs in walls 7 3 4" 15 3 4" thick (walls 2" 7 3 4" thick see the Endura Flap Dog Doors for Walls) Magnets on all sides of the flap for improved wind resistance Flaps resist 50 mph winds and endure 40 temperatures Option of a single or double flap to match your insulation requirements Built with durable, weathertight aluminum frames The Endura Flap Dog Door for Thick Walls installs in walls 7 3 4" 15 3 4" thick with the provided