... :ABS.DNV,LR,GL NK CCS certificate,etc.. Offshore Mooring chain 1. Standard length is 27.5m per piece, we also ... your requirement .2. Material: alloy steel, or according to your requirement3. Grade : R3 R4 stud or studless link chain4. Surface treatment: self ... color, black painted, zinc galvanized, hot dip galvanized or according to customer's requirement.5. The tension breaking load ...