Endura Flap Panel Height and Sash Width Extensions Flap Size:Small or just go out

or just go out

Thick flap contains magnets to provide wind resistance

Magnets along three sides of the flap for improved wind resistance

you can semi-permanently install by screwing L-brackets into the panel/height extension and sliding glass door track for stability)

Collar key available for pets who have not yet been microchipped

Endura Flap Panel Height and Sash Width Extensions Flap Size:Small or just go outExtension for Endura Flap Thermo Panels & Thermo Sashes and Dragon Panels & Sashes with aluminum frames (will not work with vinyl framed pet door) Part of the anti whoops design feature on all Thermo panels and sashes Gives you an extra 3 4" added to the panel or sash adjustment range Three colors and four sizes to match your pet door Thermo Panel Height and Thermo Sash Width Extensions These are a part of the exclusive anti whoops feature on all