Red Eye’s Pair Valve Vacuum Line outside tubing is Viton B, which is practically not affected by sunshine, hot air or ozone. Viton B has very good resistance to fuels with MTBE, methanol, ethanol, engine oil and coolant, and good resistance to DOT 4 brake fluid. Teflon FEP tubing is inside, to prevent collapse under vacuum. The Teflon FEP tubing above the tee fitting has a preformed bend to reach the Pair Valve. Red Eye uses a precision Kynar tee fitting, having no mold separation lines - laboratory grade.
Product comes with 3 nickel-plated music-wire tubing clamps of the Happy Fingers type, having loops at the ends so you can squish them open with your bare fingers.