reducing coupling 1.O.D: 2-3/8"-20" ... NU EU STC LTC BTC 4.Standard: API 5CT... reducing coupling1.O.D: 2-3/8"-20" 2.Grade ... :NU EU STC LTC BTC4.Standard: API 5CTpe reducing coupling for irrigation Diamete:12mm*3/4"-32mm*1" ISO ... standard irrigation fitting,irrigation,fittingirrigation fitting,irrigation,fittingpe reducing coupling for irrigation Specification of irrigation fitting: Item. NO. ...