Studless link anchor chains 1) Grade U2,U3, RQ4, R5 2) Material: Alloy steel 3) Finish: Black tar painted, H.D.Galv. Studless link anchor chains1) Grade U2,U3, ORQ, RQ3, RQ4,R52) Material: Alloy steel3) Finish: Black tar painted, H.D.Galv.4) Cert: ABS, LR, DNV, RINA, KR, BV, GL, CCS, NK, mill test cert, etc.,5) Chain Dia. Sizes: 12.5mm till 130mm