What type of doors can SureFlap^TM go in?

Full fitting instructions for all door types are given in the user manual.

        manual:

Fitting in most door types is straightforward. If installing SureFlap^TM in a metal door then an oversize hole is required in order to operate (full details in the manual). An easy check for a steel plate in your door is with a magnet, although this will not pick up aluminium. If there is already a hole for a cat flap then it should be easy to see whether a metal plate is incorporated into the construction.