Feature●Designed for use in OMC and Volvo Penta stern drive applications●Interchangeable with Arco R809, OMC Stern Drive 3858081, 3858809, and Volvo Penta 3858081, 3858809●Includes one trim relay●Each Sierra product meets or exceeds the original equipment part it replaces.Description Sierras 18-5700 Trim Relay is designed for use in OMC and Volvo Penta stern drive applications. It is interchangeable with Arco R809, OMC Stern Drive 3858081, 3858809, and Volvo Penta 3858081, 3858809. Each Sierra product meets or exceeds the original equipment part it replaces.