SCUBAPRO MK21 / C370

First Stage: Air-balanced flow-through piston provides constant and effortless airflow unaffected by depth, tank pressure or breathing rate.Polished chrome-plated marine grade brass body is close to 20% smaller than the MK25, making it an easy travel companion.Unique thermal exchange design with external fins optimises freezing resistance.Two high pressure ports, one on each side of the body, allow the first stage to be positioned either up or down.Standard “smart” hose routing cap offers four low pressure ports angled for more convenient hose routing (+/- 20º).Optional hose routing cap increases routing configurations with four angled low pressure ports (0°/30°) plus a fifth centralized high-flow low pressure port, ideal for technical diving.Redesigned yoke allows for easier mounting on a cylinder, and a redesigned cap protects components from water intrusion after the dive.Weight: INT 232: 780G; DIN 300; 570g.Airflow at 200bar: (l/min): >7500.Intermediate pressure: 9.0-9.8 bar