PetSafe SmartDoor Wall Entry Inner Extension Large White

The PetSafe Tunnel Extension for the Large SmartDoor Pet Door allows you to expand your main wall tunnel from 7" to 9".

Features:

• Compatible with the Large Electronic SmartDoor (PPA11-10709)
• Each extension adds 2¾ inches.
• This tunnel must be used with the Wall Conversion Kit (not included).