Bollard Material:JIS.DIN.GB.ASTM.Carbn steel Singlet:34Kg-2000Kg Class certification NK,GL, DNV, ... BV,ABS etc. ship parts Bollard Material:JIS.DIN.GB.ASTM.Carbn steelSinglet:34Kg-2000Kgsand castingEfficiency: Annual output of more than ... steel as per the Standard GB,JB,CB,ZB,JIS,ASTM,SAE,DIN or special requirements from Customers.1) Chain wheel ...