This is the Cressi Sub Octopus Compact HX78900 Octo for Scuba Diving Made in Italy It features: Downstream system Adjustable venturi effect Patented antifriction lever Big purge button Anti-scratch surface Bayonet-type cap holder with security lock Asymmetrical frontal perforation Removable exhaust tee without tools Weight without hose :135 gr JACKETED HOSE Extremely light and flexible weight: 153 gr CERTIFICATION Annex B EN 250:2014_ A>10AdegC A true featherweight second stage, the Compact is built from lightweight techno-polymers to eliminate jaw fatigue. Easy to pack and easy to dive, the Compact includes dive/pre-dive Venturi switch for managing freeflow and maximizing performance at depth.