Used Ocean Reef Predator Extender-Diving Full Face Mask with INT 2nd Stage, Surface Air Valve & Hose-New SS Adj KnobCommercial divers best choice, Special Corps Mask of choice, a mask that can withstand the toughest and most frequent use possible. Features Regulator cover in marine use Anodized Anticorodal, light weightresistant, durable aluminum compound used in aeronautics for applications requiring high mechanical resistance. The front cover of the masks state of the art integrated regulator is made of laser cut Anodized Anticorodal and has a light gold