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https://telegra.ph/How-to-Choo....se-a-Cat-Flap-Instal
Cat flaps allow your pet to move around whenever it pleases. You can choose a locking flap to stop other animals and cats from entering your home. Installing on the bifolding door is feasible provided that the door is made of toughened glass. The frame should not be rotten or damaged. The process is similar to installing a cat flap on a wooden door or uPVC. Easy to install Install a cat flap on your bifold door to allow your pet to enter and exit the