The Alemite 308730 is a hydraulic grease coupler with a rubber seal and 1/8-inch female-to-female threads. The rubber seal supports leak-resistant grease transfer on standard hydraulic Zerk fittings during equipment, automotive, and industrial lubrication work. The 1/8-inch female thread supports use with standard grease gun extensions and adapters. Supplied individually for industrial, contractor, and MRO lubrication-equipment inventories.