This is the Mares Abyss Navy 22 II Scuba Diving Regulator 1st & 2nd Stage. Features: 1st Stage Hi flow DFC port Pre-oriented ports INT connection CWD oil kit US Navy approved 2nd Stage VAD system Mesh grid Fluoropolymer resin finish Rubber hose Ideal for extreme cold water First Stage: Balanced Diaphragm HP Ports: 2 HP 7/16" UNF ports LP Ports: 1 LP 1/2" UNF port, 3 LP 3/8" UNF ports Total weight:1337g An amazing regulator for unforgettable dives.