You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing
A lightweight, techno-polymer barrel second stage, the S560 is air balanced with diver adjustable inhalation effort and VIVA. Ensures effortless and smooth breathing in all conditions. ScubaPro`s latest 1st stage addition the MK21 is the perfect marriage for the S560 2nd stage in getting the most out of your diving experience.