The Ultra-Flex Pet Door features a dual pane LEXAN® hard panel with an air gap in-between for maximum energy efficiency and wind resistance.
The flaps innovative design helps eliminate the potential for trapping ears, paws and tails. Also, the three articulated panels will assure your pet has a safe and easy entry while passing through the pet door.

The Ultra-Flex Pet Door features include: Maximum energy efficiency. Telescoping frame that adapts to any doors of 1" to 1 3/4" of thickness. Spring loaded locking slide for one-handed use. Low maintenance and durable. Easy, secure installation of these pet doors.

Dimensions:
Medium: 14.75"L x 2.25"W x 10"H (6 5/8" x 11 1/4" Opening)
Extra Lg.: 18 5/8"L x 2.25"W x 13.75"H (10 1/4" x 15 3/4" Opening)