... market with high quality and competitive price. carbon steel ring 6" Materialcarbon steel(A105,Q235,A350),alloy(F5,F9,F11),stainless ... 1/2"to64";standard:ANSI,JIS,DIN,BS,GBtypeWN,SO,BL,SW,LJ,TH,PLpaintingblack,yellow, galvanizing,antirusting oil;packingplywood case ... our tireless commitments to serving our customers. carbon steel ring 6"