This is the Cressi Compact Pro Octopus for Scuba Diving Features: a Downstream systema Adjustable venturi effecta Patented antifriction levera Thermoconductive technopolymer bodya Big purge buttona Anti-scratch surfacea Bayonet-type cap holder with security locka Removable exhaust tee without toolsa Weight without hose: 140 gra Jacketed hose extremely light and flexible weight: 153 gra Certification annex b en 250:2014 for cold water An ideal second stage for use as a safe second, the compact delivers big-regulator performance in a small, easily stowed package. It&';s unique shape make it easy to purge and deploy quickly