The Petsafe Electronic pet door with dual pane window sash by Security Boss Manufacturing features an RFID pet door that controls access in and out. An RFID collar tag is worn by your pet, to allow access for your pet only. Each unit features tempered safety glass and an adjustable, spring loaded end for easy install and removal. You have the option to choose which side of the window sash you would prefer to have the Petsafe Electronic pet door installed. Two pet opening sizes are available, small 6 5/8″ x 8″, and large 13 1/16″ x 15 3/4″.PetSafe Electronic Pet Door for Sash Windows

The Petsafe Electronic sash window inserts are constructed of heavy duty aluminum framing so the window insert will look great and last for many years. Every component of this Petsafe Electronic sash pet door is completely replaceable and maintainable for life. This will be the last window sash pet door you will have to purchase.