Check the listing for details. H2Odyssey RG-2V SCUBA Breathing Device 1st Stage Standard Piston Regulator. Condition: New. Listed at 119.99 USD. H2Odyssey has been a trusted scuba diving brand since 1986! Easy to operate first stage standard piston regulatorScrews directly into a standard SCUBA cylinder 6 cu ft up to 80 cu ftThe specific thread form used with most SCUBA cylinders is named 0.750-14 NPS, often referred to as "3/4 NPS". Red On/Off knobTwo LP ports and two HP ports360 degree Low Pressure port swivel (rotating like a clock hand)One LP port is the swivel where you'd connect your LP regulator hoseOne LP port is available (currently plugged) where you can screw in your Octo LP hoseOne HP port is for the one-way fill valve (male nipple with black rubber cap)One HP port is open for gauge or transmitterHP fill port has a male thickness of 7.80mm (0.78cm)The female fill adapter opening is 8.00mm (0.80cm)3 Fill Adapter options: Yoke, Station, or DinGreat for Argon (Drysuit Inflation) & Redundant Air SystemsManufacturer's Warranty is 1 Year from Date of Purchase