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Outer Ring Material CS Metal Ring Gasket Spiral Wound Sealing Size ASME B16.21-2011 PRODUCTS DISPLAY STANDARD ·HG20610 /HG20631 / ·ASME B16.20/·DIN / BS 3381-1999 ·JIS B2404-1999 JIS TS-1998 ·GB/T4622...