Cold water divers or those frequenting harsh environments will appreciate this perfectly matched pair. The A700 is a complete complement to SCUBAPRO’s MK17, a high performing balanced diaphragm first stage, engineered exactly for such conditions. Full-metal body and components contribute to less risk of freezing and the MK17 is environmentally sealed so water cannot enter the inner mechanism. Balanced technology provides consistent performance at all tank pressures, at any depth, and optimizes the second stage performance, for effortless breathing. Dry ambient pressure chamber provides better protection and performance in cold water Polished chrome edition available exclusively with the A700 second stage Unparalleled breathing performance for the A700 at virtually any depth, temperature, and diving position Work of breathing results are 0.49 Full metal body and components assure the best thermal exchange Compact dimensions for lightweight comfort