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It is possible to put an apron flap inside the upvc panel, or even a double glazing sealed unit. However, the most effective alternative is to install a new glass pane with a pre-made hole. Follow the instructions provided with your kit. Make sure that the template illustration accurately depicts the shape (circle or square). Safety A microchip activated pet panel in your upvc door is a great solution if you have a dog or cat and would like to let them out into th