Bettina1112625 years ago000Can you please tell me the dimensions of the opening Where the dog has to go through? Small dog BettinaShow in original language (German)Flurinas5 years ago • purchased this product000purchased this productI do not have this pet flap installed and in operation near me. According to information on the manufacturer's website https://www.surepetcare.com, the narrowest passage point for the pet is 178 mm (W) x 170 mm (H).Show in original language (German)Comment