https://botdb.win/wiki/Fitting...._a_Cat_Flap_in_a_UPV
https://opensourcebridge.scien....ce/wiki/Choosing_Cat
Cat and dog flaps with double-glazed doors allow your pets to come and go as they please. They also help keep your pet safe when you are away. You can put in the cat flap inside an existing uPVC or double glazing sealed unit. However, you will require a replacement part that has a premade opening. A glazier can do this using the appropriate equipment and the right training. Easy to install A cat flap installed in your home is a great option to give your pet