SCUBA REGULATOR SET: Piston design 1st stage is ... It also comes with a comfortable silicone mouthpiece and a hose with a 30-degree inline swivel that reduces jaw fatigue. MADE BY DIVERS, FOR ...

2 Local factors such as joint laxity, anatomical factors, capsular or muscular inflammation, and articular stress of long duration resulting from holding the regulator mouthpiece in scuba diving or ...