In case of a collision or other impact, the buoy still retains its full floating capacities even if the shell of the buoy has been damaged. Polystyrene is a freon-free, recyclable plastic material with good floating capacities. Polyethylene is an environmentfriendly and recyclable plastic that is widely used in marine applications. The buoy is equipped with hot-galvanized rod, which makes it easy to adjust the length of the chain. The rod is delivered separately together with the buoy and is easy to install.