... 4.durable and perfect for yacht, ship 1.Name:Stainless Steel Marine Bollard,mooring bollard2.Surface:Handpolish3.Material:SS304 OR ... ,soluble glass process complex shell process.Materials: stainless steel ,carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN ... -ray,metallograph.Quality control: According to ISO 9001 2001 Stainless Steel Cross Bollard