... docks , platforms for yachts, boats, motor-boats, ferry, floating bridge Pontoon Features:Colors: Blue,Orange, Red, etc Weight: 7kg/pcBuoyancy: 350kg ... maintain, repair, change, inspect.Application:1. Ferry dock, floating bridge, artificial island, jetty.2. Dock for boats, motor boats, yachts, surfboat.3 ... constructions.7. Fish culture net cage, outdoor fishing platform,etc Pontoon