This Stopcock Valve is manufactured for use in low and medium pressure lines using fluid or gas. They are suitable for vacuum and pressure applications up to 50 PSI. The valve features a flow-through design that limits restriction through the valve stem. The large openings reduce turbulence and guarantee virtually no drop in pressure. The Stopcock Valve is manufactured with FDA approved materials. The valve body is clear polycarbonate with a white HDPE stem. The valve stems can be color coded in black, red, green, blue, and yellow. A variety of combinations are available.