Sureflap Pet Door Tunnel Extender
SureFlap tunnel extenders can be used to create a longer approach tunnel to the SureFlap Microchip Pet Door when it is installed in a wall.
The Pet Door Tunnel Extender fits snugly onto the tunnel of the SureFlap Microchip Pet Door and multiple extenders can be stacked together to form a tunnel of any length.
Sureflap Pet Door Tunnel Extender Size Guide
Below are the measurements calculate the number of tunnel extenders you require to fit the depth of your wall.
67mm - 117mm / 1 Tunnel Extender
117mm - 167mm / 2 Tunnel Extenders
167mm - 217mm / 3 Tunnel Extenders
217mm - 267mm / 4 Tunnel Extenders
267mm - 317mm / 5 Tunnel Extenders