The AT20 Octopus is a great match for the AT20 regulator. It provides the same features and performance as the AT20 second stage but comes with a high visibility yellow front cover and a 36 yellow hose. It is designed for water temperatures above 50Adeg F (10Adeg C) Pneumatically-balanced second stage results in smooth, easy breathing. The diver has full control of the venturi by means of a lever so as to prevent accidental freeflow when the octopus is not being used. The Comfo-bite(TM) mouthpiece virtually eliminates jaw-fatigue. It is designed for water temperatures above 50Adeg F (10Adeg C). Compatible with EAN40 out of the box.