Ideal Pet Products Aluminum Sash Window Pet Door, Adjustable Width 33″ to 38″, Cat Flap, 6.25″ x 6.25″ Flap Size, White

Specially designed for sash windows and comes with a spring loaded locking slide and clear vinyl flap on standard plastic pet door models or a 4-way lock and unbreakable LEXAN flap on cat flap and chubbykat door models. Features adjustable width 33″ to 38″ and minimum sash window height requirement is 10.625”.
High quality white finish aluminum construction
Installs easily into most styles of sash windows
2 Window sizes available: adjustable width from: 23-inch to 27-inch (23) and 27-inch to 32-inch (27)
7 Window sizes available: adjustable width from: 23-inch to 27-inch (23), 27-inch to 32-inch (27) and 33-inch to 38-inch (33)