Ideal Pet Products Aluminum Vertical Sash Window Pet Door, Adjustable Sizes to Fit Window Heights from 32-1/2" to 35-1/8”, Chubby Kat 7-1/2” x 10-1/2” Flap Size

High quality white finish aluminum construction installs easily into most aluminum vertical sash (side sliding) window styles.

Locking rigid 7-1/2” x 10-1/2” flap is made of unbreakable clear Lexan to allow pet to see through opening and is non-toxic for added safety. Recommended for pets 2 to 25 Pounds

Chubby Kat has a 4-way locking knob that you manually turn to desired position: in only, out only, free in/out and locked.

Elegant white aluminum finish: Crafted with high-quality materials, it's not just durable but also adds a touch of elegance to your window and thanks to its spring-loaded top, this pet door offers a handy 2.5" adjustment range.