This set combines the 75XR first stage, designed for challenging dives, and the resistant DR Deep Reg second stage - a robust technical set. This set includes: - 2 x DR secondary regulators - 2 x 75XR primary regulators - 2 hoses (60 cm to 210 cm) - Safety lock Description High-performance diving regulator Constant flow without excessive positive breathing pressure (VAD design) No user adjustments needed Robust and compact metal housing made of highly resistant chrome and nickel-plated brass Slight passive buoyancy Powerful and resistant, ideal for shore diving, deep diving, cold water diving, and wreck diving Cover design distributes water flow and reduces free-flow (mesh design) Easy purge button Carbon/Titanium coated and Polyurethane Miflex hose: - Higher resistance to cuts, abrasion, bursting, and UV rays - less buoyancy - Environmentally sealed - Flexible and comfortable Meets breathing requirements according to EN250 standard at a depth of 400 meters with a breathing rate of 62.5 liters/minute using a breathing mixture of 1.6% oxygen in helium (according to NORSOK U-101 standard). Technologies ACT Valve - Advanced Coating Technology Advanced Coating Technology The new valve in "X" systems increases durability by an impressive 600%, even in the harshest conditions. Full Metal Technology Thanks to their superior mechanical reliability and high thermal conductivity, our metal second stages have an extremely long lifespan, making them ideal for cold water diving. The high thermal conductivity of the metal also reduces the feeling of dry mouth during dives. VAD Design An air-bypass tube delivers air to the mouthpiece, creating a circular vortex with a low-pressure zone in the center, which keeps the diaphragm low during inhalation, providing extremely smooth and sensitive breathing at all depths. Dynamic Flow Control (DFC) System Reduces pressure drop during inhalation, increasing gas flow, especially in extreme conditions. Material: Metal. Technology: First Stage: Balanced Diaphragm. High-pressure outlet: 2 (7/16" UNF). Low-pressure outlet: 8 (3/8" UNF). Second Stage 1: Full Metal (Nickel-Chrome Plated Brass). Second Stage 2: Standard Valve. Flow rate: 620 L/min - 22 cu ft/min. Weight (without hose): 269 g / 9.6 oz. Hose length: 60 cm / 24 in - 210 cm / 7 ft.