The endura flap can be installed in walls up to 8 thick.
Locking pet doors for walls.
The endura flap double flap wall mount pet door is an energy efficient double flap dog door that mounts into an exterior wall so fido can come and go as he pleases.
In doors walls most doors will come with a doggy door locking cover which goes into the interior frame.
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It features a three sided power magnet to ensure it stays shut even in high winds and includes a clip locking cover to guarantee it stays secure when you re away.
If your walls are thicker you can buy a door mount and build your own tunnel.
Some are more high security dog doors such as the hale or endura locking cover.
The hale pet door for walls can be installed in walls up to 16 thick.