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SureFlap Cat Flap Tunnel Extenders can be used to increase the approach to the SureFlap Microchip Cat Flap or the DualScan Microchip Cat Flap when installed into a wall.
The Tunnel Extender fits snugly onto the tunnel of the cat flaps and multiple extenders can be stacked together to form a tunnel of any length.
The original tunnel length of the Microchip Cat Flaps is 70mm long and each extender adds 50mm to the length.