The OPLFC-A-300 (05701049) Pressure Swichgage® is a 4.5" gauge manufactured by Murphy by Enovation in the United States. It comes with a 30-day limited warranty and has a Prop 65 WARNING for California customers regarding potential chemicals that may cause cancer. This gauge serves as a crucial component for monitoring pressure levels in various applications, providing accuracy and reliability for troubleshooting and maintenance purposes. In original box but open.