OMEGAs Polyurethane tubing is available in two different formulations: TYUS polyester and TYUTH polyether. TYUS polyester tubing is extremely durable, resisting both abrasion and flex fatigue. It remains flexible and transparent even at low temperatures. TYUS polyester tubing is highly resistant to aliphatic hydrocarbons and petroleum products; however, it is NOT recommended for use with water-based solutions. TYUTH polyether tubing is more flexible than TYUS polyester tubing and is the formulation utilized in select peristaltic pump applications. Like TYUS polyester tubing, TYUTH polyether tubing also has excellent abrasion resistance and remains flexible at low temperatures.