The M 7 Stem is made of stainless steel and features an easy-to-find, new air port design, for easier air flow identification, and a pivot style rocker on the opposite side for easy, manual air flow control. The M 7 Stem has a streamlined design with a textured pattern throughout for a pleasant new look and feel. The mouthpiece is tapered to 10mm and this stem will work with any DynaVap Tip. **This is just the stem - a Standard Condenser must be added for full functionality.