The most valuable tool for dentistry is now even more versatile! A custom disconnect at the rear of the MicroEtcher CD allows you to plug the unit directly into your Bien Air handpiece connector. The MicroEtcher Bien Air offers the same great performance and all the features of the Microetcher IIA. The MicroEtcher CD features an interchangeable, autoclavable nozzle that rotates 360o. .048 or .032 tips are available, plus four different nozzle angle options. Fits Bien Air Coupler.