Diameter (mm):150/2000/250/300/350/400   Height (mm) : 211/251/298/321/346/371     Material: steel/steel stainless/aluminum   Classification: ABS,CCS,BV,GL etc. Available in  steel/steel stainless/aluminum   Surface before painting: sandblasting Painting:  Epoxy zinc rich primer coating or anode oxidation-treament Customize available OEM service and Special requirement is available