... :U2,U3,CM490,CM690 3.standard:NK,DNV,LR,ABS,CCS 4.stable quality and best price We own the eight ... ,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,CCS.If you have any demands and questions,pls don't ...