Give your cat their own door instead of leaving the window cracked open. This cat door fits into the window track and adjusts across a 5-inch range to cover widths from 27 to 32 inches, with the same 7.6 x 10.3 inch flap opening used across the lineup. Switch the lock ring between in-only, out-only, two-way, or fully locked whenever you need to manage when your cat can come and go, such as keeping them in overnight. A magnetic flap paired with a brush-lined edge closes quietly and blocks most drafts, which matters if the window sees a lot of daily traffic. No drilling is needed for setup, just slide the aluminum frame into the track and tighten the mounting knobs until secure. Since the frame measures 1.6 inches thick, measure your window's inner track if it's wider than that, or the outer track if it's narrower, and confirm the reading lands between 27 and 32 inches before ordering. The aluminum and glass build weighs 7.5 pounds.