Item:Stainless steel quick joint Pressure-proof hydraulic pressure test 300 PSI for up to 4'' and 200 PSI for 5'' and up 1. Materials: Stainless steel(investment cast)1/2''-6'' packing: BUNA-N(NBR)(or TERLON, VITON on request) 2. Our couplings conform to MIL-AA-57326(MIL-C-27487) and are interchangeable with other products which meet this specification 3. Threads: ANSI B1.20.1(NPT), DIN2999/259, BSP, BS 21(PT) With very good quality and competitive price! swivel joint: 1.High-tech processing 2.OEM as your design 3.Variety of brass material 4.Good quality swivel joint: 1.Different kinds if material available 2.Good production ability 3.Technology support 4.mature exporting experience(India,Middle East,Thailand,UAE,America and so on) 5.Skilled craft 6.Excellent processing equipment(CNC Lathe Instrument Lathe)