Defender Security U 9809 Sliding Window Lock for Vinyl Windows (2 Pack)

Good product, fits well

Door works as designed. It took my cat a little while to figure it out. I got the small door and my cat is 15lbs. I would say he is max size with out going larger. Door has been surprisingly good with summer heat as well. Highly recommend with having for a month so far, hopefully holds up well with the elements in the future.

Very good product.

Chainsaw is spoiled!

Our cat, Chainsaw, is very active. She loved being outdoors (in her Catio) but was very demanding so we decided to buy her a cat door. She learned how to use it almost immediately and now can roam in and out as she pleases.