Cat door tunnel extender

Sureflap cat door tunnel extenders can be used create a longer approach tunnel the sureflap microchip cat door when it is installed in a wall. The sureflap fits snugly onto the tunnel of the sureflap microchip cat door and multiple extenders can be stacked together form a tunnel of any length. The tunnel of the sureflap microchip cat door is 70mm long and each tunnel extender adds 50mm the length of the cat door's tunnel click on the link below calculate the number of tunnel extenders you require fit the depth of your wall.