【Real Materials】 Dental matrices are all made of polyester and are safe to use. For Anterior Teeth Alcohol immersion disinfection,disposable use,can not be disinfected under high temperature and high pressure; 【Packing】20 pieces matrices/pack 【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!