SureFlap Cat Flap Tunnel White 
SureFlap Cat Flap Tunnel White  can be used when installing SureFlap Cat Flap TM in a wall.  Each tunnel extender adds 50mm (2") to the length of the tunnel and the tunnel extenders can be stacked together to create a tunnel of any length.  SureFlap's existing tunnel is 70mm (2.75") long. 
 
Refer to the chart to calculate how many tunnel extenders you will require.


 * Please be sure to check that the pet door you purchase is suitable for your needs prior to installation. If the pet door has been installed and you subsequently decide to uninstall and return it, this will void our return policy (except in instances where the product is defective).