400 series Magnetic 4 Way Locking Deluxe Cat Flap
4 locking options: in only, out only, opened, locked. Operated by a Magnetic collar key. Helps keeps out strays which do not wear collars. Supplied with one collar key and Staywell collar. Universal fitting for wooden doors, windows, glass windows and doors, single & double glazed, fits brick walls, fits PVC / UPVC & metal, walls & doors. Fixed tunnel to suit most thickness of doors. Additional magnetic collar key packs sold separately.
Fitting instructions are available on the Staywell web site, link below. This is the 400 magnetic series.