brass style CGA540 oxygen regulator Body style: CGA540 nut& nipple styleMaterial: brassOutlet:Barb outletFlow rates: can be 0-4lpm, 0-6lpm, 0-8lpm, 0-15lpm,0-25lpmColors :can be chrome plated and Nickle platedOutput pressure:50PSIDiameter: 1 3/8 NominalLength: 4 3/5 approximatelyGauge: Ø1.4 0-3000 PSI, Clean for O2 Service, UL Listing, Boot, 1/8 NPT, Fill/Refill