High quality materials - this C-shaped opener is made of durable transparent plastic, is reusable, free of harmful substances, environmental protection, very good effect, ergonomic, fits the mouth, supports high temperature disinfection and soaks disinfection.Protect Oral Health - Often used in home teeth whitening procedures, they can open your mouth and keep the whitener away from your lips and gums.Widely Used - This C-shaped mouth opener is used in dental offices and teeth whitening salons, and can also be used as a fun gift or toy to smile and laugh while watching friends. It is also a good game for family gatherings, parties, or gatherings between friends.30-piece set - you get 30 beautiful C-shaped mouth openers. 10 large size, 10 standard size, 10 small size: , two colors, blue and white, so you can use it on different occasions.Service - If you have any questions, please feel free to contact us. We will reply you within 24 hours. We will give you return or refund processing.