Mooring bollards manufactured using the sand casting method with the materials of choice being either steel or ductil

iron.( Bollard) Other types of cast iron can be used, but they lack the predictable ductile failure mode preferred by Engineers. The choice of whether to use cast steel or cast iron is usually a preference of the customer, often decided by what is currently being used. 1. Kidney Bollard, 2. Horn Bollard, 3. Tee Bollard .(Bollard)