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Dragon Sash Window Pet Door | Single Flap, White Frame| Medium Flap (Pets Up to 15″ Tall), Window Width (22″ – 25″) | Includes Locking Cover | Energy Efficient, Sturdy, Low Cost

Amazon.com Price: $199.99 (as of 04/09/2023 01:01 PST- Details)

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FLAP SIZES have an opening for Medium flaps of 7 1/16″w x 13 1/16″h and for Large flaps it is 9 3/8″w x 16 9/16″h. Both sizes have a 4 inch stepover accommodating pets up to 16″ tall for Medium and 19″ tall for Large. See Thumbnail image for more information on measuring your pet’s height.
SASH WIDTHS & HEIGHTS vary but all require a minimum track thickness of at least one inch (thicker tracks may need shimming). Medium flap sashes require the window to be raised to at least 22″ and Large flap sashes require the window to be raised to at least 26 inches. Width ranges are determined by measuring from widest point left to the widest point right. Panels will not contract narrower than lowest measurment, but you can trim 3/4″ off the right side flange.