Sierra's 18-2697-1 Lower Unit Seal Kit is designed for use in Mercury/Mariner and Chrysler/Force outboard engines. The kit contains: (2) Sierra 18-0581 Oil Seals, (1) Sierra 18-0584 Oil Seal, (1) Sierra 18-0585 Oil Seal, (1) Sierra 18-0586 Oil Seal, (2) Sierra 18-2945 Drain Screw Gaskets, (1) Sierra 18-4261 Washer, (1) Sierra 18-7162 O-Ring, (1) Sierra 18-2728 Water Tube Seal, (1) Sierra 18-2558 Impeller Gasket, (1) Sierra 18-2559 Impeller Gasket, and (1) Water Pump Base. It is interchangeable with Mallory 9-74210, GLM 87576, Chrysler/Force/US Marine 26-41365A3, and Mercury Marine 26-41365A1, 26-41365A2, and 26-41365A3. Each Sierra product meets or exceeds the original equipment part it replaces.