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If your door or wall too deep for your cat flap, add single or multiple extensions for easier installation. The PetSafe® Cat Flap Extension Tunnel allows your cat door to be installed into thicker doors or walls and is compatible with the PetSafe® Manual 4-Way Locking Cat Flap. This extension tunnel measures (1 7/8") deep. Trust PetSafe® to help keep your pet healthy, safe and happy.

• Compatibility - Cat Flap Extension Tunnel is compatible with the PetSafe® Manual 4-Way Locking Cat Flap
• When to Use - Use the extension tunnel when you install your cat door into thicker doors or walls; extension tunnel measures (1 7/8") deep