This is the Apeks AT20 Octopus Scuba Diving Safe Second Stage

Features:

• 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™ mouthpiece virtually eliminates jaw-fatigue.
• It is designed for water temperatures above 50° F (10° C).
• Compatible with EAN40 out of the box.

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 50° F (10° C) "