Endura Flap Severe Weather Vinyl Sliding Glass Dog Door

Double flap sliding glass door dog door specifically designed for vinyl sliding glass doors with channel-style tracks in severe weather climates  Insulated dog door withstands -40 °F and 50mph winds  Dual pane, Low-E glass reduces UV rays and infrared light Semi-permanent installation in 'U' shaped tracks a minimum of 1 1/2" thick Ranging in width from 11.12 - 17.25 inches (see size chart below) How to Measure Your Track Height video guide  The Endura Flap Vinyl Panel is the most insulated pet door on the market, designed specifically for vinyl-framed sliding glass doors that have Channel-style tracks (will not work with monorail tracks). Unlike other options for a sliding glass door with a dog built-in (which generally has a metal frame), this door has a vinyl frame to match the original vinyl of your door and fit more comfortably in the track. This semi-permanent, extreme-weather dog door has a spring-loaded design, which makes installation quick and easy. It safely secures the p