This is the Dive Rite RG5800 FT1/XT2 Scuba Diving Regulator 1st & 2nd Stage Features: XT2 Second Stage Weight: 9 oz (255 g). Balanced downstream internal second stage valve. Second stage adjustment knob fine-tunes inhalation effort. Can be oriented for left or right hose routing. Oxygen compatible O-rings and lubricant. FT1 First Stage Material: Black DLC-coated brass. Weight (DIN): 1 lb, 11.6 oz (782 g). Weight (Yoke): 2 lbs, 3.4 oz (1,004 g). Intermediate Pressure: 140 PSI. 4 LP ports (3/8-24 UN). 2 HP ports (7/16-20 UNF/ISO 263). 28 inch Airflex Braided LP Hose Tube: HS-PVC. Cover: 48-strand braided polyester. Reinforcement: Polyester-reinforcing material. Working Pressure: 1,500 PSI. Burst Pressure: 6,000 PSI. High-performance pairing of Dive Rite&';s XT2 Second Stage and FT1 First Stage Regulators. A solid first and second stage regulator is the foundation for any regulator package you use while breathing underwater. Customize this kit with any other Dive Rite regulator components to suit your diving needs. This base regulator set provides seamless, controlled breathing for the most comfortable dive possible.