What's New? The 2021 “M” is the 5th iteration of our signature medical grade stainless steel devices. Let us begin with the tip. A Septa serrated fully faceted extraction chamber facilitates loading and sits atop an incremental fin profile. Contained inside the extraction chamber is our two position Adjust-a-Bowl feature that allows you to adjust the size of the dosing chamber to your needs. The stem is enhanced with an intuitive tactile navigation geometry making it easier than ever to find the next generation chiral airports. Opposite the airport you will find a pro"M"inent compound angled rocker that facilities quick and easy hand movement when modulating the airports. Finally, a 10mm tapered mouthpiece seals the deal mating perfectly with water pieces. Product Characteristics