The SureFlap microchip cat door tunnel extender allows you to increase the length of the SureFlap Cat Flap or Pet Door if you are installing the cat door into a very thick wall.
- 2 sizes: standard or large cat door -
- 2 colours: white or brown -
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Regardless of the model (standard SureFlap Cat Flap or Sureflap Pet Door for large cats or small dogs), the length of the cat door tunnel is 70 mm, and each tunnel extender allows you to add 50 mm to the length of the tunnel.
To determine how many tunnel extensions you need to install the cat door, consult the diagrams below: