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
Bulletproof reliability and minimal maintenance make it the system of choice for demanding training centers as well as new divers. The R195 is a new design based on the heritage of the classic R190 second stage, re-engineered with modern features and materials. The R195 combines a classic downstream valve with a large diaphragm and classic purge button. Its simple and robust construction offers the utmost in reliability and makes the R195 the ideal second stage for new divers and a perfect choice for deco tanks thanks to its reversible hose attachment.