1.Item: concentric pipe reducer 2.Grade:310S,309S,316,316L,321, ... you Choose us· ISO System· SGS and BV Audited company .· Industry experience over 20 years.· Management Systems-Internal Software ... 347H,304,304L,302,301,201,202,etcTypeConcentric reducer and eccentric reducer, Seamless reducer and seamed/welded reducerOutside diameterThe big head: ... Contact Person:Ms Melody Cheng concentric pipe reducer