Compatible with the sterilization and the autoclave (below 121 degree celsius). It was originally created for dental use, these "cheek retractors" have become the inspiration for a hilarious game that's been going viral on the web. So whether for fun, for serious use, or for both, these are the "cheek and lip retractors" you need! Specifications: - Made of high quality reusable clear plastic. - Made in China. - Type: T. - Size: Small. - Color: Blue.