POLY FLO TUBING/ 1/4 inch outside diameter, Color: BLACK. 44P-BK pack of 100Poly-Flo Polyethylene Tubing | 1/4in O.D., BlackPoly-Flo tubing is ideal for use in pneumatic lines, pitot and static lines, instrumentation systems, and water lines (as well as limited food service). It is constructed with..