Blue Boa DE is designed for the hygienist that prefers the traditional ¼” diameter saliva ejector. It eliminates heavy drag on wrist from short tubing, and attaches to the high volume suction. Used in conjunction with ¼” saliva ejector or our double sided suction mirror. Autoclavable. The DE can also be used with the curly hygoformics with an adapter (a cut piece of saliva ejector) It is the most versatile.