SureFlap Microchip Cat Flap Grey Tunnel Extender

The Cat Flap Tunnel Extender should be used with the SureFlap Microchip Cat Flap when installing in a wall.  The existing tunnel length on the cat flap is 7cm.  Each tunnel extender adds a further 5cm to the length of the tunnel.  Tunnel extenders can be connected together to create a tunnel of any length through a wall.