... anchor chain 1.Material: U1, U2, U3 2. Type: Open and Stud 3. Certificates:CCS, ABS, etc. u3 and u2 marine ... the chain from knotting up when twisted, thus avoiding problems when chain is retrieved with a windlass.1. Material: U1, U2, U32.Certificate: CCS, ABS ... .80knPackage of anchor chainSMC Products are packed and labeled according to the regulations and customer's requests. Great care is taken ...