The Ideal Ultra-Flex Pet Door - Extra Large
This ABS plastic pet door features the patented Double Wall Lexan® Ultra-Flex Flap for maximum energy efficiency. It has a spring loaded locking slide for easy one-handed use, and it's durable and low maintenance. The inner telescoping frame adapts to doors of 1" to 1 3/4" thickness. Easy to install. Limited lifetime warranty. Flap door measures 10 1/4" x 15 3/4".