Perfect Pet Plastic Pet Door, Medium in White. Perfect Pet. https://www.petco.com
Our Multi-Flex pet door is available in two sizes to fit most pets from 25 pounds to 80 pounds. The extra large is shown here with a 10 and 1/4 by 15 and 3/4 inch flap. The three part, double wall flap is made of a clear unbreakable polycarbonate. It is articulated to be ultra flexible while adding superior insulation and wind resistance. The strong, telescoping plastic frame adjusts to fit most door thicknesses from one to 1 and 3/4 inches. This door includes a lockout slide to allow you to keep your pet in or out. This pet door is designed specifically for installation into an exterior door where environmental integrity is a concern.