VEVOR Pet Door, 31.2 x 43.5 cm Metal Frame with Lock and 3-Flap System, Weatherproof Doggy Door, Easy to Install in Interior or Exterior Walls, Pet Door Suitable for Cat Doggie Kitties (White-Medium)

The wall is 108 cm thick. Will this suit. I do not want to buy something that does not fit properly so please be honest. I am in my eighties Meg