Feature:1. Can be cleaned by high pressure steam, used to distinguish between orthodontic and dental instruments.2. Non‑toxic silicone material made, safe and secure use and has excellent strong toughness.3. Small size and light weight design makes it simple and easy to use, wonderful and practical dental tools.4. There are 4 different colors code rings available, you can choose according to your needs.5. Including a total of 100pcs color code rings of the package, meeting your different demands.Specification:Item Type: Color Code RingsMaterial: Silicone Usage: Convenient to distinguish between orthodontic and dental instruments Package List:100 x Color Code Rings