Extension tunnel for use with PetSafe Deluxe Cat Flap when the door or wall is too deep for the cat flap. Single or multiple extensions can be used as necessary to form a comfortable sleeve between inside and outside flaps.

The Deluxe Cat Flap can fit a doors, windows and walls of up to 50mm depth, any wider and tunnels are required. Each tunnel can add 48mm depth to the overall sleeve. So, using one tunnel will accommodate a door width of up to 98mm, two tunnels will accommodate up to 146mm etc.