The Sierra Marine Oil Pressure Sender is a premium, marine-grade electrical sending unit engineered to deliver highly accurate oil pressure readings directly to your boat's dashboard gauge. Built with a rugged, corrosion-resistant casing to withstand the extreme vibrations, moisture, and saltwater exposure of marine environments, this sender is ideal for sterndrive and inboard engines. Featuring a standard 1/8" NPT thread-in attachment and calibrated to monitor pressures up to 80 PSI, it provides reliable, real-time feedback to help prevent costly engine damage and ensure safe operation on the water.