這套氣流供應系統以輕鬆順暢的供氣與卓越的可靠性著稱，是冷水潛水與技術潛水的首選裝備。MK25 EVO 一級頭在所有水溫下都能展現穩定的性能，是頂尖表現的最佳典範。搭配經典的 G260 二級頭，這套系統即使在最極端的環境中，也能提供頂級的呼吸性能，成為潛水員最值得信賴的夥伴。

一級頭 (First Stage)

• 採用鍍鉻黃銅機身的氣體平衡貫通活塞設計，確保氣流穩定且順暢，不受深度、氣瓶壓力或呼吸速率的影響，讓潛水員在任何情況下都能輕鬆呼吸。
• 專利 XTIS（延伸隔熱系統）：全面隔絕內部機構與外部環境的熱傳導，提升 30% 的冷水適應性，並在極寒水溫下延緩結冰現象，同時不影響呼吸性能。隔熱系統的關鍵部件以藍色標示，便於識別。
• 升級隔熱設計：新型彈簧隔熱塗層、機身隔熱襯套、防凍蓋，以及加大的機身與蓋螺紋，均與 XTIS 協同作用，進一步提升冷水環境下的能表現。
• 防凍保護：大幅提高在極端水溫下潛水時的呼吸可靠性。
• 雙向高壓接口：兩個相對的高壓接口設計，讓一級頭可根據需求選擇向上或向下安裝。
• 五個高流量低壓接口：搭配旋轉式轉盤，提供最大的管線配置靈活性。
• 外部中壓調節功能：讓技術人員能夠快速且輕鬆地微調性能。
• 重量（INT 232 規格）：790 克。
• 氣流表現（200bar）：>8500 升/分鐘。
• 中壓範圍：9.0-9.8 bar。

二級頭 (Second Stage)

• 氣體平衡閥設計：確保在不同深度與供氣壓力下，吸氣阻力始終平穩順暢。
• 尼龍玻璃纖維外殼與大尺寸振膜：採用 SCUBAPRO 最大的二級頭外殼與振膜設計，無論在水下何種姿勢，都能提供極致的呼吸靈敏度。
• 陽極氧化鋁前蓋環：兼具輕量化與耐用性，提升整體質感。
• 金屬組件：包括金屬氣閥筒身與進氣管，增強在極端環境下的防凍性能。
• 高流量排氣閥：降低呼氣阻力，提升整體呼吸舒適度。
• 可調節吸氣阻力旋鈕：根據深度、水況及個人偏好，精細調整氣流供應。
• Venturi 真空輔助（VIVA）潛水/預潛水開關：防止在冷水環境或作為備用二級頭時發生自由流。
• 可逆式呼吸管連接：方便調整管線配置，適應技術潛水需求。
• 超大內徑呼吸管：確保每次吸氣都能提供充足的氣流。
• 符合人體工學的矯正型咬嘴：佩戴舒適且不影響氣流暢通。
• 重量（不含咬嘴）：268 克。
  
• 氣流表現（200bar）：1800 升/分鐘。

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Offering effortless air delivery and outstanding reliability, this is the go-to air delivery system for cold water or technical diving. There’s no better example of solid first stage performance in all water temperatures than the MK25 EVO. Teamed with the venerable G260, this system can be relied upon to deliver top-of-the-line performance in the most extreme conditions.

First Stage

• Air balanced flow-through piston in a chrome-plated brass body provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
• Patent pending XTIS (Extended thermal Insulating system) fully insulates the inner mechanism from the environment, improving cold-water resistance by 30% and delaying ice formation in extreme cold-water conditions without compromising breathing performance. Key insulation system components are visible in blue.
• New spring insulating coating, body insulating bushing, anti-freeze cap, bigger body and cap thread all work in concert with the XTIS to improve cold-water performance.
• Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.
• Two opposing high pressure ports allow the first stage to be positioned either up or down.
• Five high-flow low pressure ports on a swivel turret maximize hose routing options.
• External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
• Weight: INT 232: 790g.
• Airflow at 200bar: (l/min): >8500.
• Intermediate pressure (bar): 9.0-9.8.

Second Stage

• Air-balanced valve smoothes out the inhalation effort at varying depths and supply pressures.
• Nylon fiberglass design features SCUBAPRO’s biggest second stage casing and diaphragm for the ultimate in breathing sensitivity, regardless of position in the water.
• Anodized aluminum front cover ring.
• Metal components, including metal air barrel and metal valve inlet tube, increase resistance to freezing when diving in extreme conditions.
• High-flow exhaust valve reduces exhalation for better overall breathing comfort.
• A diver-adjustable inhalation effort knob fine-tunes air delivery to suit changing depths, water conditions and personal tastes.
• Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch prevents free flows in cold water or when used as an octopus.
• Reversible hose attachment allows you to easily adjust hose routing for tech diving configurations.Super-flow hose features an oversized bore that allows more air to flow on each inhalation.
• Ultra-comfortable orthodontic mouthpiece is easy to grip yet doesn’t inhibit airflow.
• Weight (without mouthpiece): 268g.
• Airflow at 200bar: 1800 l/min.