This is the Tilos Atlantis Octopus Adjustable Air Flow Features: Adjustable venturi knob Outstanding breathing performance Silicone diaphragm and exhaust valve High grade chromed brass air supplier sleeve Meets CE Certification standards Hose length 36in (69cm) The Tilos Atlantis octopus is an affordable regulator that performs well. There is a venturi air flow control knob on the side of the regulator that allows you to control the amount of air you take in.