Newly restyled for 2013, our best-selling S600 is continuously evolving and is in its 5th edition. Timeless design and chrome plated marine grade brass make this high performing system a classic. Air balanced valve Diver-adjustable inhalation effort Diver-adjustable Venturi-Initiated Vacuum Assist (VIVA) Super-flow hose High comfort orthodontic mouthpiece Full metal valve housing Weight: 193g / 6.8oz Air flow at 200 bar: 1850 l/min - 66 SCFM Maximum low pressure: 14 bar / 203 psi