Perfect as a pick-up buoy and ideal for all diving applications. Newly designed 5/16"-dia. pultruded fiberglass mast with PVC outer layer adds strength and flexibility, also assuring that fiberglass shards will not be exposed. Float is Urethane foam-filled. Blow-molded, high-density polyethylene outer shell provides great flotation and years of service. Corrosion-resistant, vinyl-coated cast metal weight for superior scratch protection for your boat.