PetSafe Wall Tunnel Extension Electronic SmartDoor, Large, White

CPA00-12021 Features: -Smartdoor. -Additional Expansion for use with Smartdoor Large. Product Type: -Installation Accessories. Placement: -Wall. Color: -Black. Pet Category: -Cats/Dogs. Dimensions: Overall Product Weight: -1.31 lbs.

• Extends the Large SmartDoor ? Wall Entry Conversion Kit to install the Large Electronic SmartDoor? in walls thicker than 7 1/4"
• Extends an additional 2 3/4"
• Tunnel extension can be trimmed for extension less than 2 3/4"
• Multiple extension tunnels can be stacked to extend through any wall thickness