Designed for industrial use in aquaculture, this 680 kg compensator buoy is built for use in mooring aquaculture cages and for marking outer extremities. This family of mono-hull buoys is available in four different sizes. It is built to adapt to your application depending on your working loads. A ¼” thick polyethylene shell that will never peel or corrode and inhibits marine growth encapsulates fully fused EPS foam provides superior buoyancy a virtually unsinkable platform that will not degrade to pollute waterways or shorelines. 15″ diameter galvanized steel load plates are secured with 5 bolts on the top and bottom of the buoy for greater load disbursement. The 680 also features hot dipped galvanized steel swivel mooring and lifting eyes for ease of use.