Atomic aquatics - b2 regulator din sealed- first stage only

Even though the use of multi-layer chrome plated brass for the body of the first stage is a more conventional material choice... the performance of the b2 is truly superior to any other rival. atomic designed signature breathing performance into the b2 to give a diver the perfect combination of comfort, style and value. the main design difference? the total weight of the b2 is only 9 ounces more than the t3. first stage materials are chrome-plated brass and 316 stainless steel atomic jet seat high-flow piston first stage optional factory-sealed first stage to prevent outside contamination such as silt and sand and prevent freezing nitrox ready for mixtures up to 40% first stage ports: 2 hp fixed / 5 lp on swivel cap 2-year / 300-dive service interval