the maker buoys are rotationally-moulded in high-visibility, UV-stabilized polyethylene. Moulded inserts on the top section of the float allow for convenient lantern attachment, while the buoys are foam filled with polyurethane to prevent water ingress in the unlikely event of damage. Rotationally moulded to 7mm wall thickness Foam filled with polyurethane Made from strong, durable, UV-stabilized virgin polyethylene High visibility red, green, white or yellow Excellent buoyancy & stability Mould-in graphics to suit customer requirements Environmentally friendly & recyclable Customized, OEM , pleased that you send the picture or drawing