marine aluminium accommodation ladder 1.materil:aluminium LF5 2.Surface oxidation treatment 3.supply CCS,ABS,DNV,GL.... marine aluminium accommodation ladder Product instruction: Design, manufacture according with ISO5488-79 and GB/T14360-93aluminum structures, light in weight, high strengthCurve footplate, Surface has non-slip grooveOverall anodized, good corrosion resistanceAs customer ...