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Product DescriptionSierra 80W-90 premium gear lube. Recommended for all general marine applications requiring a GL-5 class lubricant. Ideal for replacing all old hypoid 90 application needs. Formulated for use in freshwater or saltwater. Reduces friction and protects gears, bearings, and other components. Includes four 55-gallon drums of gear lube. Sierra Part #18-9600-7P.