Plexidor Pet Doorsare professionally engineered and manufactured from quality materials to be the very best: quiet, energy-efficient, completely secure, long-lasting and most importantly safe and easy for pets to use. Sizes available for cats up to Great Danes. These are 'doors' not flaps.Delivered to you from here in the UK to ensure reliable delivery and replacement parts service. Made in the USA.With a Plexidor Performance Pet Door you will enjoy...» Peace and Quiet» Security and Convenience» Undisturbed Sleep» Uninterrupted TV» Freedom from worry about letting your pet out