The SCUBA FORCE Black Devil 2nd stage is a pneumatically balanced 2nd
stage for superior performance even in deeper dives. Adjustable Venturi
valve to improve breathing. Respiratory resistance adjustable by the
diver. Optimized for use in cold water, ideal heat exchange through
metal ribs in the connection area. Compact size with large bubbles
deflector. Ergonomically shaped silicone mouthpiece. Navy brass, coated
stainless steel spring and tilt lever. Excellent breathing properties at
Pneumatically balanced design for superior performance in depth.