PetSafe - Staywell 300, 400, 500 Series Tunnel Extension

Door or wall too deep for your pet door? Add a single or multiple extensions for your pet's ease! This tunnel is compatible with the Staywell 300 series (Deluxe Manual Cat Flap), 400 series (Deluxe Magnetic Cat Flap) and 500 series (Deluxe Infra-red Cat Flap) and provides 47 mm of extra tunnel length for your pet door.