This mid-range regulator is a balanced first and second stage design, it is part of Aqualung's core range. When comparing performance with price, Helix is a must have. It represents the DNA of the Aqualung regulators. The Aqualung Helix can be reviewed every 2 years. Balanced diaphragm first stage provides superior, consistent performance. "T" shape body for streamlined hose positioning. In-line ergonomic Venturi knob let's make precise adjustments, even while wearing gloves. The Helix regulator's provides amazing breathing, coupled with its generous features, and at an attractive mid-range price, provides the best value of any regulator offered today. The balanced diaphragm chrome plated marine brass first stage provides superior, consistent performance and the pneumatically-balanced second stage results in smooth, easy breathing.The T-shape of the first stage optimizes the location of the 4 low-pressure (LP) ports and 2 high-pressure (HP) ports. The Helix Core uses parts that are common to other Aqualung models for easier servicing. The easy-to-grip venturi lever prevents unwanted free-flow at the surface while giving a performance boost at depth. The Helix Core regulator is compatible with EAN 40 new, out of the box. Equipped with Aqualung's patented Comfo-Bite mouthpiece installed with standard bite wing mouthpiece, along with a reusable mouthpiece clamp. The regulator weighs 31.22 oz (885g) and comes with a 29" (73.7cm) low pressure 3/8" threaded hos