This Middleby solenoid valve is a reliable and efficient component for commercial cooking equipment. With a 1/2 inch NPT and 1/2 PSI rating, it is suitable for use with natural gas or propane. The valve is manufactured by Middleby, a trusted brand in the industry, and is sold as a single unit. It is compatible with various cooking equipment and is easy to install. This solenoid valve is an essential part for your equipment to function effectively and safely.