Lightweight aluminum alloy construction provides a light weight and rust resistance, ensuring long lasting use. Userfriendly design with precise threading and a concaveconvex anti slip treated knob for smooth operation and comfortable handling. The 8 mm interface features a ball type lock for easy and secure use. Accurate and clear readouts. Choose between two available dials, MPa dial or Psi dial, both with accurate scales for precise measurements. The clear dials are easy to read during diving activities. Use scenario: On site refilling at a dive or center, enabling precise pressure control with a secure connection. Use scenario: Field refilling on a boat or remote dive site, providing reliable performance with easy to read dials and secure locking. Use scenario: Home maintenance or routine calibration to monitor fill pressures and ensure consistency and safety.