Marine Bollard Marine bollard is one type of marine hardware that is installed on the dock for mooring ropes. It is an important marine hardware equipment that make sure the security of ships. As a professional golden supplier, we provide a great amount of marine bollards which are not only the standard bollards but also the customized bollards as customers require. For more product information, please feel free to contact us. Features of GB554-83 Bollard 1. Material: cast steel; 2. Double bitt bollard; 3. Technic Standard: GB554-83; 4. Nominal Diameters:100 to 800mm; 5. Weight: 19 to 3071kg; 6. Epoxy coating, bitumen paint, anti-corrasion; 7. Marine Classification Certificate: ABS, CCS etc. 8. Can produce according to customer’s design;