Endura Flap Thermo Sash 3e Pet Doors for Sash Windows

Sash window insert with built-in pet door Withstands extreme climates Low-E glass installed to reduce harmful UV and infrared light Easy to install and doesn't require semi-permanent installation Locking cover included that loads from the top Video to explain how to measure sash window track width Extra Large Flap 22" - 25" Width Panel is all metal (no glass), custom-made-to-order, and non-returnable The Endura Flap Thermo Sash 3e Pet Door for Windows is an insulating, weatherproof panel that fits snugly into the track of most windows. This semi-permanent door installs easily with a spring-loaded design that safely secures the panel in place without the hassle of permanent installation. The Thermo Sash 3e provides quality insulation and energy efficiency, as the perimeter of the flap contains magnets to keep the flap shut when not in use. This pet door for sash windows will help keep your house at your desired temperature, and it gives your pets the freedom they crave without com