The 4mm (5/32") Outside Diameter x 100', Black, Polyurethane is engineered for maximum flexibility, durability, and chemical resistance, making it ideal for pneumatic systems, fluid transfer, and industrial applications. It provides a lightweight yet robust solution for applications requiring precise fluid or air flow control. NSF 51® Polyurethane (PUR) Shore A 98 tubing is a strong, lightweight, and flexible option known for its excellent resistance to abrasion, cold, chemicals, and kinking. Made with high-quality ether-based materials, it offers superior durability, tight OD tolerances, and easy installation while meeting NSF, FDA, RoHS, and UL standards.