Grade 2 and Grade 3 Stud Link Anchor Chain 1)Material:Iron 2)Model Number:U2 U3 3)Size: 19-122 4)Structure:Roller Chain Grade 2 and Grade 3 Stud Link Anchor Chain 1) Material:Iron2) Model Number:U2 U33) Size: 19-1224) Function: Transmission Chain5) Structure: Roller Chain6) With ABS, DNV, BV, KR, LLOYDS, CCS Certificate Grade 2 and Grade 3 Stud Link Anchor Chain