New, never used.

The Prince Adjustable Flow Control Valve, model RD-150-16, is designed to regulate the flow of hydraulic fluid with a maximum flow rate of 30 gallons per minute (GPM) and a range of 0-16 GPM. Made in the United States by Prince, this valve features a 1/2 NPT port diameter and operates at a maximum pressure of 3000 pounds per square inch (PSI). It is a versatile unit suitable for a variety of industrial applications requiring precise control over fluid flow rates.