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• Use it during installation of SureFlap in a wall
• Adds 50mm to the length of the tunnel
• Can be stacked together to create a tunnel of any length
The Sureflap Cat Flap Tunnel Extender can be used when installing SureFlap 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 chart (see useful links) to calculate how many tunnel extenders you will require.