Hard shell, foamed mooring Buoys bright orange polyethylene and filled with closed cellular foam for long life under the most extreme marine conditions. Resistant to fire, oil and gas. Molded in UV inhibitors and Fungicides. Use with chain collar 99-030-f and/or 90-032-f Warning: never tie mooring lines to the top eyelet of the buoy or swivel eyelet. Always attach mooring lines to the anchor chain swivel beneath the buoy.