Wall tunnelWall tunnel

Deluxe Cat Flap Tunnel Extension


This wall extension is the only fit for your PetSafe cat door models. One per box.



Install your cat door in walls up to 4 inches thick and thin with this tunnel extension.

The extension is designed for PetSafe cat doors and adds an extra 1 7/8 inches for easy installation flush with the finish material on deeper interior walls. Two extensions are required for flush installation of exterior walls with sheathing and siding. Connect several together for even thicker applications.


  • Tunnel extension for PetSafe Cat Doors
  • Adds an extra 1-7/8 inches for flush installation in thicker walls and doors
  • Easy to install for quick setup in most walls
  • 2 extensions required (second sold separately) for installation in exterior walls with sheathing and siding
  • Connect several together for even thicker applications
  • Fits models PetSafe 4-Way Locking Cat Flap (Staywell 300) and the PetSafe Magnetic 4-Way Locking Cat Flap (Staywell 400 series) and Staywell Infra-red electronic 500 series


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