Features:

• Second stage with a 27¡¨ black hose.
• Pneumatically balanced design for superior performance at depth.
• Oversize adjustment knob makes it easy to adjust the breathing effort in cold water whilst wearing gloves.
• Large venturi lever for Dive/Pre-dive adjustment, makes it easy to locate and use for preventing free-flow during shore entries or long surface swims.
• Optimized for use in cold water, through deeper metal ribs in the connection area to dissipate the cold and draw the warmth from the water.
• Unique black silicone mouthpiece with eminent ripples alleviates overall jaw fatigue during the dive.
• Pre-positioned front cover ring holes which ensure ease of serviceability after heavy use.
• Specially engineered purge shapes and vents prevent diaphragm surge in currents.
• Ergonomic exhaust channels bubbles away from interfering with field of vision.
• Integrated purge button.
• Anodized aluminum cover ring.
• Ideal choice for the most rugged of diving conditions.
• Weight (without hose): 210g
• Dimensions (front profile): 6.8 cm (approx. 2.67¡¨)
• Factory set inhalation effort: 1.1 CIW

Description:

This air-balanced 8517K SK500 main secondary head has an external adjustable air outlet knob, dive/preparatory dive adjustment switch to avoid automatic air leakage (free flow), and a finned duct designed with an antifreeze ring. The 27-inch black braided hose increases cohesion comfort.