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201/ J4 J5 Square Tube Welded Tube BA 14 Gauge Factory Wholesale SS201 J4 J5 Tube
Stainless steel J3, J4 are stainless steel 200 series of different kinds of steel. The 200 series steel also has J1, 201 and 202. China mainly has the following 200 series steel :J1,J3,J4,201,202. Then came the 200 class of steel with even lower nickel control,