E-Z Flo mask-mounted pressure demand regulator Features Top Down Convertibility concept, which allows increase in versatility and compatibility with Scott product line Sturdy, zinc-plated carbon steel wire-formed back frame Durable nylon harness system Two-piece polymer waist fastener Alligator-style shoulder clips Audible bell alarm is mounted on first-stage pressure reducer Over-the shoulder luminescent pressure gauge Double-locking latch and durable fabric band allows quick and easy cylinder change Warranty and Services Five years