For wall installations, tunnel extenders can be stacked together to create a longer approach tunnel to the SureFlap^® Microchip Cat Door, SureFlap^® DualScan Microchip Cat Door or SureFlap^® Microchip Cat Door Connect when it is installed in a wall.

The SureFlap^® Cat Door Tunnel Extender fits snugly onto the 70mm long tunnel of our cat doors. Each tunnel extender adds 50mm to the overall length of the tunnel.