1.Item: concentric pipe reducer 2.Grade:310S,309S,316,316L,321,347H,304,304L, ... ,347,347H,304,304L,302,301,201,202,etcTypeConcentric reducer and eccentric reducer, Seamless reducer and seamed/welded reducerOutside diameterThe big head: 3 ... :86-13920621855Skype:tgwygtTrade Manager:cn220168219 Contact Person:Ms Melody Cheng concentric pipe reducer