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B16.9 SS reducer Product specifications 1.Wall thickness: SGP/SCH20, STD, SCH40, SCH80, XS 2.Standard:GB, ASME/ANSI B16.9, DIN, JIS,EN,GOST 3.Material:Q235, 20#, 10#, Q345.A234 WPB, WP5, WP9,WP11,ST37...