Transform your m420 smoking system for easy use with concentrates. Simply slide out your glass bowl, and slide in the vapor stem for use with all your favorite 14mm accessories such as quartz nails, Domeless TI Nails, and all new 14mm accessories that continue to come to market. The m420 Vapor Stem does not come with a 14mm Nail or Dome. We highly recommend tandem use with one of our vertically-oriented accessories such as the m420 Footed Mycroft or m420 Redibowl. Happy 710!