There are several items that are essential when putting together a save-a-dive kit, cylinder valve O-rings, fin straps, buckles, etc. One of the most important items is the spare regulator mouthpiece. This Aqua Small Soft Bite Silicone Mouthpiece is universal and will fit a large variety of regulators out there. Mouthpiece is soft and comfortable. Don't let a bad mouthpiece be the cause of a leaking regulator always carries a spare. Mouthpiece is designed for people looking for a smaller version for added comfort and comes with a tie wrap for easy installation on your regulator.