【Real Materials】 Dental matrices are all made of polyester and are safe to use. 【More Dental Consumables】There are many types of dental matrix bands, this is just one. If you have any questions, please contact us and we will answer them at any time! Alcohol immersion disinfection,disposable use,can not be disinfected under high temperature and high pressure; Polyester Matrices For Anterior and Molar Packing : 30 pcs/box(For Anterior / Molar)