POLY FLO TUBING/1/4 inch tube outside diameter, wall thickness .040 inch, Color: Green. 44P-GN pack of 100Poly-Flo Polyethylene Tubing | 1/4in O.D., GreenPoly-Flo tubing is ideal for use in pneumatic lines, pitot and static lines, instrumentation systems, and water lines (as well as limited food ser..