Sureflap Pet Door Tunner Extender
The Pet Door Tunnel Extender can be used to create a tunnel to the SureFlap Microchip Pet Door.
The tunnel of the SureFlap Microchip Pet Door is 70mm (2.75") long and each tunnel extender adds 50mm (2") to the length.
View the below chart to calculate the number of extenders required to fit the depth of your wall.
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