Halcyon H-50D First Stage Regulator Regulator Sets an integrated adjustable inhalation control

an integrated adjustable inhalation control knob allows you to fine-tune the second stage’s air delivery effortlessly

You will never forget to set the valve since it automatically activates when closing the case

MK11 First EVO Stage Regulator

The O2 clean steel Concave 12L Euro Sidemount Cylinder is available with a high-quality and reliable BtS Expandable Sidemount Valve

including extreme cold water

Halcyon H-50D First Stage Regulator Regulator Sets an integrated adjustable inhalation controlThe Halcyon H 50D First Stage is a high performance diaphragm design is fully sealed and purpose built for harsh conditions like ice or environmentally contaminated environments. Diaphragm first stages are historically popular with cold water divers, and the Halcyon H 50D was engineered for extreme conditions. Dive into extraordinary places with your H 50D, and be confident you have a rugged regulator to meet all your demands. Halcyon H 50D is