PetSafe 900 Series Extension Tunnel - 18mm Depth, Compatible with 919 Series Cat Flap

for Deep Installations: Designed to accommodate doors or walls that are too deep for your pet door, ensuring seamless access for your pet Specific Compatibility: Works exclusively with the Manual 4-Way Locking Classic Cat Flap (919SGIFD and 919EF), providing a fit Easy Installation: Simply attach the extension tunnel to your existing cat flap setup for a quick and straightforward enhancement Single or Multiple Extensions: Add one or more tunnels to achieve the desired depth, offering flexibility for various installation needs A 27 Year Legacy of Joy: Since 1998, PetSafe has been dedicated to creating innovative products that ensure safe and healthy pets, bringing happiness to pet families worldwide and enriching the lives of pets and their owners