This needle valves is make of brass and zinc alloy to ensuring durability Supports long-term use and reduces the need for frequent maintenance The valves features a knob, crafted to facilitate precise setting of flows rates This hydraulic flows control needle valves incorporates a versatile 1 / 2inch or 3 / 8inch port, designed to regulate flows efficiently in Single Direction, whilst also offering the capability to shut off flows when necessary Equipped with a nitrile rubber O-rings seal, this needle valves ensuring a connection that significantly minimizes the risk of accidental leakage This hydraulic needle valves showcases an opening pressure of 7.25PSI and a maximums flows rating of 40L / Min, ensuring adaptability across various hydraulic setups and applications, Manufacturer: Greabuy