Muerte "Archbishop Desmond Tutu" The MK25 first stage is our absolute top performer and is a superior regulator thanks to its ultra stable intermediate pressure resulting in an extremely punctual and constantly high delivery of air. The Means Instant Air Flow at any cylinder pressure and water temperature for a real carefree dive. ; Muerte "Archbishop Desmond Tutu. Paired with the air balanced high performance S600 second stage, this system is our top performer. ; Muerte "Archbishop Desmond Tutu" balanced flow valve provides constant & effortless air flow. ; Muerte "Archbishop Desmond Tutu" Diver Adjustable Inhalation Control enables personal adjustment of breathing effort. ; Muerte "Archbishop Desmond Tutu" Diver Adjustable Venturi Initiated Vacuum Assist (VIVA) Dive/Pre – Dive control switch and extra high flow exhaust valve account for easy inhale and exhale. ; Muerte "Archbishop Desmond Tutu" precision moulded, lightweight components and anti – freeze materials provide the high corrosion resistance and enhance cold water performance.