Why choose Brass & Titanium? The B2 regulator by Atomic Aquatics offers a superior performance that surpasses any other rival. Atomic has skillfully incorporated their signature breathing performance into the B2, providing divers with the perfect combination of comfort, style, and value. The B2 weighs only 9 ounces more than the T3, making it a lightweight option without compromising on performance. Garnering numerous awards from independent tests and reviews, the B2 has proven to be the most awarded regulator on the market. The first stage of the B2 is made of chrome-plated brass, ensuring durability and performance. It also features the Atomic Jet Seat high-flow piston first stage, which enhances breathing efficiency. Additionally, divers have the option to choose a factory-sealed first stage, preventing outside contamination such as silt and sand, and avoiding freezing. With the B2, you can dive confidently with Nitrox mixtures up to 40%. The first stage ports include 2 HP fixed ports and 5 LP ports on the swivel cap. The second stage of the B2 shares the same all-Titanium construction as the Atomic T3. It features the patented Atomic Seat Saving Orifice, which extends the life of the regulator. The Atomic Automatic Flow Control (AFC) ensures optimal performance in any diving condition. The B2 is designed with a rapid adjustment knob, allowing for easy manual de-tuning of the second stage in special situations. To enhance comfort and flexibility, the B2 includes a polished 316 stainless steel Atomic Comfort Swivel. With a new high-flow second stage case, the B2 significantly reduces breathing effort at any depth, from shallow waters to deep dives.