Universal Low Oil Pressure Ignition or Electric Fuel Pump Shutoff Switch by Longacre®. 1/8" NPT. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and enduring value. This product is distinguished by total quality assurance, unsurpassed by anybody else. Low Oil Pressure Ignition or Electric Fuel Pump Shutoff Switch. Switch shuts off the ignition or electric fuel pump when oil pressure drops below 12 psi. Helps prevent engine damage or fire and keeps the motor from starting until the oil pressure is up. Should be used with momentary bypass switch for starting.