Whiskers & Windows Custom Cat Door for Horizontal Sliding Windows

Quick and easy installation and removal with spring-loaded frame Height is adjustable up to 3 inches to fit most horizontal sliding windows  Non-custom height ranges of 34-37", 43-46" and 46-49" can be found on the Whiskers & Windows Cat Door for Horizontal Sliding Windows page Durable horizontal sliding window pet door for Cats and Large Cats or very small dogs  The Whiskers and Windows Horizontal Cat flap door for Windows is a fast, hassle-free, affordable way to install a pet door for cats in your home. This aluminum or vinyl window insert requires no drilling or cutting (can be trimmed 3/4" shorter with a metal cutting blade if needed) and can be installed in seconds. Our spring-loaded pet door insert design allows for instant adjustment of up to 3 inches and creates a snug weather-tight fit. For increased insulation, you can purchase foam weather stripping to seal where the window frame and pet door meet.  Features: Great for renters with low-impact installation 3/16" cl