Pet One Poly Dog Door For Security Screens Glass And Glass Sliding Doors LargeMake your home a little more pet friendly! With a Pet One Pet Door, your pet has can come and go as they please. These clever doors are loaded with features, they're built to last and, best of all, theyre available in a range of different sizes and designs. Theres one for every homeand for every pet, too! Made from polycarbonate for durability and strength Two way locking system lets you control when your pet is allowed to leave and enter the house