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 This needle valves is make of Stainless Steel to ensuring durability Supports long-term use and reduces the need for frequent maintenance Equipped with a nitrile rubber O-rings seal , this needle valves ensuring a connection that significantly minimizes the risk of accidental leakage The valves features a knob , crafted to facilitate precise setting of flows rates 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: Watreketal