Staywell PetSafe 740 Medium Dog Flap Pet Door White 2 Way Locking
Staywell Doors. Maximum pet weight: 18 kg (40 lb). Maximum pet shoulder width: 219 mm (8 5/8"). Pet Max shoulder width: 219mm. Cut out size: 281 mm x 237 mm (11 1/8" x 9 3/8"). Cut out size: 281mm x 237mm.