• The compact and lightweight MK21/S560 is an excellent mid-range reg system.

    1st stage: The MK21 is smaller and lighter than the MK25 and uses a smaller piston, but it delivers the same level of breathing performance. The MK21 also provides exceptional resistance to freezing due to the thermal exchange produced by the external fins on its polished chrome brass body.

    The MK21's innovative "smart" hose layout comes with a standard cap with four low pressure ports angled (+/- 20º) to maximize hose routing. This standard cap can be replaced with an optional cap that offers four low pressure ports at more extreme angles (0°/30°) plus a fifth centralized high-flow low pressure port - a useful configuration for technical diving.

    2nd stage: The air-balanced S560 second stage features a lightweight techno-polymer casing and comes with full user controls , including an inhalation effort adjustment knob and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch. It differs from the S600 mainly in the valve housing (barrel) material.
  • Designed for cold water diving and Nitrox ready up to 40%

    ScubaLab 2014 Best Buy (category regs under $500)

    1st stage
    • Body material: marine-grade, chrome-plated brass
    • Air-balanced flow-through piston
    • 2 HP ports
    • 4 LP ports
    • Available in INT and DIN 300
    • Airflow at 2900psi: >7500 l/min = 265SCFM
    • Intermediate pressure: 130-142psi/9-9.8bar
    • Weight: INT: 1.65/744g - DIN: 1.22lbs/555g

    2nd stage
    • Air-balanced
    • Casing material: carbon fiber/technopolymer
    • Valve housing (barrel) material: carbon fiber/technopolymer
    • Inhalation effort adjustment knob
    • Venturi system (dive/pre-dive switch)
    • Weight: 0.38lbs/172g (without hose)
    • Airflow at 2900psi: 1850 l/min - 66 SCFM.

    Service interval: 24 months or 100 dives - whichever comes first
  • Ships within: 1-4 business days. 

    All SCUBAPRO 1st and 2nd stages are covered by a limited lifetime warranty.

    Useful links:

    SCUBAPRO's regulator comparison chart

    SCUBAPRO product registration

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