Type U.S.A Mooring Bollard Type U.S.A mooring bollard is one type of double bitt mooring bollard. It has two nominal diameters DF-491, DF-498. Except U.S type bollard, we supply a large number of other standard marine bollards: JIS F2001 bollard, DIN82607 bollard, GB554-83 bollard, GB554-96 bollard (simple bollard, inserted bollard, cross bollard), GB556-65 welded inclined bollard, GB/T 10106-88 cross bitts, CVI bollard, dock bollard etc. If you’re interested in our products, please feel free to contact us. Features of Type U.S.A Bollard 1. Nominal Diameters: DF-491, DF-498; 2. Weight: 449kg, 612kg; 3. Size: see the specification form below; 4. Material: cast steel, cast iron; 5. Surface: Polished,galvanized;red, grey etc. optional color; 6. Certificate: CCS,ABS, LR, BV etc.; 7. Produce the customized bollards;