SureFlap tunnel extenders can be used to create a longer approach tunnel to the SureFlap Microchip Cat Door when it is installed in a wall.
The SureFlap tunnel extender fits snugly onto the SureFlap Microchip Cat Door and multiple extenders can be stacked together to form a tunnel of any length.
The SureFlap Microchip Cat Door’s tunnel is 2¾” long and each tunnel extender adds 2“ to the length of the cat door’s tunnel. Use the link below to calculate the number of tunnel extenders you require to fit the depth of your wall.
