Perfect Pet The All-Weather Energy Efficient Dog Door, Extra Large, 9.75″ x 17″ Flap Size Price: $117.39 (as of 12/03/2023 07:59 PST- Details) & FREE Shipping.

Energy efficient structural foam molded plastic. Nylon for draft restrictor
Adjustable frame telescopes ¾-inch to 1 ¾-inch thickness
Innovative Double Vinyl Flap design creates energy efficient air pocket for maximum insulation