The economical CW octopus is the same internally as the ZX 2nd stage, but is more compact and lighter because it does not have the adjustment knob. The CW Octopus has a Venturi Control Lever that allows the diver to set the octopus 2ndstage in the Pre-Dive position until needed. This is very important in Octopus regulators, since the Pre-Dive position is much more resistant to Venturi-Free-flows that can sometimes result in significant air-loss during a dive. The addition of the chrome plated brass heat sink makes the CW Octopus an simple, light weight choice for cold water diving. The CW Octopus comes with a Yellow cover and 36" hose.