The Genuine NAPA RELAY SOLENOID ST404 is a high-quality, new-old stock OEM part designed for use in various industrial and mechanical systems. This solenoid valve, manufactured by NAPA ECHLIN, is specifically designed for reliable valve operation. As a trusted brand in the industry, NAPA products are known for their durability and performance, making this relay solenoid a dependable choice for your plumbing or hydraulic needs.