... .Degree:15,30,45,90,180 3.Grade:310S,309S,316,316L,321,347H,304,304L,201 4.OD:1/8"-100",5S-160S The reason ... ,AISI,ANSI,SUS,ASME etcMaterial 310S,309S,316,316L,317,317L,321,321H,347,347H,304,304L,302,301,201,202,904L,Duplex,etcType15 ° ,30° ,45° , 90 ...