This SureFlap Cat Flap/Door Tunnel Extender is the perfect addition for pet owners looking to enhance their furry friend's freedom and comfort. With a Microchip lock mechanism, your pet will have exclusive access to their designated area. The tunnel extender comes in a sleek white color and is available in a small size, making it easy to install and use. The product is designed to fit SureFlap brand cat flaps and doors, and it comes with a French manual for easy reference. The model number for this particular variant is Tunnel Extender - White.