The Airstream Mouthpiece is the same mouthpiece that comes standard on all Airstream blowpipes. It has an oval shape to allow for more airflow to your pipe bag. Available in three lengths: 3.5″, 4.5″, and 5.5″. All mouthpieces come with a mouthpiece protector on them. The Airstream Mouthpiece is threaded with a universal fit ready to fit most blowpipes.