1.Selected high‑quality stainless steel 304 materials, the inspection indicators are in line with the standard. 2.The stainless steel needle valve is clean and bright inside, and the ruler can be controlled accurately. 3.Strong connection, high pressure resistance, tightness and repeatable installation. 4.The product is easy to install and maintain, and it is safe and reliable to work. 5.To adjust the flow or pressure of liquid and gas pipelines, and the hand feels smooth and delicate.