For wall installations, tunnel extenders can be stacked together to create a longer approach tunnel to the SureFlap Microchip Pet Door or the Microchip Pet Door Connect when it is installed in a wall. The Pet Door Tunnel Extender fits snugly onto the 70mm long tunnel of our pet door. Each tunnel extender adds 50mm to the overall length of the tunnel.
Please note this is suitable only for the Microchip Pet Door and will be too big for the standard Microchip Cat Flap.