Hollis 321 Octopus features the same quality as the Hollis 221 Second Stage.
The Hollis 221 Second Stage Regulator is a Pneumatically Balanced Demand Valve Design and it features an Adjustable VENTURI System (A.V.S). This simple Dive/Pre-Dive Switch allows the diver to Adjust Inhalation Effort so the Second Stage won't Free-Flow during shore entries or long surface swims.The Control Knob has an Easy Grip for Precise Adjustments even while Wearing Gloves.
The Hollis 321 Second Stage Housing is manufactured from Durable ABS/Polycarbonate. It also comes equipped with a Patented Orthodontic Silicone Rubber Mouthpiece for Comfort and Reduced Jaw Fatigue.
The Hollis 321 Octopus Regulator has a High Visibility Yellow Front Cover for Easy-Identification in an Emergency Out-of-Air Situation.
The Regulator comes with a 36' (91cm) Low Pressure (LP) Hose with 3/8" Threaded End. The Hose is also Bright Yellow for Identification as the Alternate Air Source.