Product features:
1. Equipped with an anti backflow device, it effectively prevents sand powder and water vapor from flowing back to protect the cleanliness and hygiene of the dental chair pipeline;
2. 2-hole/4-hole and quick connect options are available, suitable for dental chairs of various brands both domestically and internationally, with convenient connection and wide applicability;
3. There is no oral mucosal irritation through mucosal stimulation according to the biological test protocol.