Tygon S3 E-3603 non-DEHP tubing is specially formulated for resistance to flex-fatigue and abrasion. In many peristaltic pump applications it will outlast the original formulation, R-3603, by 3 to 1. As a tubing for instrumentation connection, vent, drain and other general laboratory applications, Tygon S3 E-3603 Tubing offers superior life, which minimizes the labor and expense of replacement.