1.size:10mm-250mm 2.grade:U2,U3,CM490,CM690 3.standard:NK,DNV,LR,ABS,CCS 4.stable quality and ... that in overseas marketing,we have been getting good reputation for 10 years ,next we introduce the products as follows:Anchor ... chain steel for marine use1.size:11mm-250mm.2.grade:CM490, CM690, 20MnCrNiMo.3.standard:NK,DNV,LR,ABS ...