TheMK17 EVO 2/S600 combines a fully sealed diaphragm first stage with an air-balanced second stage that has proven its reliability over many years. The reinforced fiberglass S600 with stainless steel cover and ring provides constant, effortless airflow at any depth or temperature, even under extreme diving conditions.

The compact, balanced diaphragm first stage is sealed against water and contamination, making it ideal for cold or dirty environments. Its air-balanced design delivers smooth breathing regardless of depth, tank pressure, or breathing rate. A dry chamber keeps contaminants out, while ribbing improves heat exchange for excellent cold-water resistance. Two opposing high-pressure ports set at 15° allow upright or inverted mounting with optimal hose or transmitter routing.

The second stage offers an air-balanced valve for consistent breathing comfort, a durable metal inlet tube, user-adjustable inhalation effort, and a VIVA switch (Dive/Pre-Dive). The Superflow hose delivers high airflow, and the orthodontic mouthpiece fits comfortably without restriction. CE-certified for all conditions, including extreme cold, per EN250A standards.

Specifications:

• 2nd stage design: Balanced

• 1st stage type: Diaphragm

• 2nd stage series: S-Series

• Water temperature: Warm, Cold, Temperate

• Connector type: INT

• Nitrox mix: Up to 40%

• High-pressure ports: 2

• Low-pressure ports: 4

• 1st stage material: Chrome-plated brass

• 2nd stage material: Reinforced technopolymer housing, Metal components

• Item weight: 2.38 lb