we are one of the largest carbon black manufacturer in Shandong province,China.carbon blackN220N234N330N326 N339N375N550N660N762N774.ASTM standard. Quantity :20000MT/year.ASTM standard.Packing:25kgs kraft bag wrapped with pallets or 500kgs,1000kgs jumbo packing bags.MSN zhaochuandi at MSN dot com