This stem is also compatible with the Arizer Solo 2, Air, and Air 2. Measuring at 4.5 inches, the Solo Vaporizer Straight Mouthpiece is crafted from premium strong borosilicate glass allowing it to withstand the daily wear and tear. Combining exceptional functionality and enhanced performance, this straight tube mouthpiece will help you enjoy satisfying sessions where ever you go. The mouthpiece is easy to store and can conveniently slid inside your pocket. Additionally, the Solo Vaporizer Straight Mouthpiece keeps residue from building up inside the tube, allowing for easy cleaning. If you are looking for a sturdy, reliable mouthpiece then the Solo Vaporizer Straight Mouthpiece is for you.