The McCulloch Medical™ Anesthesia Masks cover a wide range of animals, from calves and foals to puppies, kittens and raptors. They are made from the most robust materials available to provide you with long-life performance. Diaphragm material is inert with polycarbonate for longer life. Diaphragms are made from tear-resistant thermoplastic material. Masks are manufactured from durable polycarbonate. Clean in 1:20 solution of bleach and water. All masks carry the McCulloch Medical™ 2-year replacement warranty.