Mantle Marine have a number of used steel pontoons for sale.
Nominal dimensions are 12m x 2.4m x 2m, but there are a couple of 16m units.
Pontoons are coated inside and out.
6mm plate, 2 manholes, road transportable, ideal for finger jetty, floating wharf etc.
Located in Geraldton; priced well at $35,000 each.