1. Grade: AM2,AM3 Marine Accessories, Offshore mooring Accessories ORQ,R3,R3S,R4,R4S
2. Size: R3-152mm,R3S-152mm,R4-152mm,R4S-137mm
3. Standard: ISO-1704-2007,GB/T-549,W22,API-2F(U.S.A),Rules of most major Classification society
4. Certification: ABS,DNV-GL BV,CCS,CR,KR,LR,NK,RINA,RMRS