• The MK21 is SCUBAPRO's most compact piston first stage. It 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 C350 is the most compact second stage in SCUBAPRO's line, so takes up little space when traveling. It is lightweight, breathes smooth and easy, and offers a coaxial-flow inhalation effort control knob and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch.
    • Designed for cold water diving
    • Nitrox-ready up to 40%
    • 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
    • Service interval: 24 months or 100 dives - whichever comes first
  • Ships within: 1-4 business days. This item qualifies for free shipping within Canada! Restrictions apply, but very few. Please check our shipping policies for details.

    All SCUBAPRO 1st and 2nd stages are covered by a limited lifetime warranty and participate in the "parts for lifetime" program. Restrictions apply (valid for original owner and at regular service intervals)!

    Useful links:

    SCUBAPRO's regulator comparison chart

    SCUBAPRO product registration

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