Endura Flap Cat Door for Horizontal Sliding Windows

Fits horizontal sliding windows with 1" (aluminum) or 1-1/4" (vinyl) track width, and adjustable panel height in standard and custom ranges. Durable aluminum or vinyl frame and weather-resistant flaps for extreme conditions. Quick, easy installation with spring-loaded design, perfect for renters. Custom size options are available for varying window dimensions. The Endura Flap Cat Door for Horizontal Sliding Windows offers a versatile and energy-efficient solution for providing your feline friend with easy access to the outdoors. Designed to fit seamlessly into the existing track of your side-to-side sliding window, this innovative cat door features a removable panel and a spring-loaded design that securely installs in just minutes without any permanent alterations, making it perfect for renters. It's perfect for providing 4-season access to an outdoor catio.  Constructed with a durable aluminum or vinyl frame and weather-resistant flaps, this cat door is built to withstand extreme