PU Hose: The hromee reversing hose is made of ultra - flexible polyurethane (PU), whose soft surface is less likely to scratch the surface. It is also resistant to twisting, wear, oil, grease, more durable and lighter than nylon. Fitting and plug kit: this hose is equipped with a 1/4 inch NPT universal fitting for industrial (I/M), Aro (A) and automotive (t), as well as a two-piece type I/M plug. Heavy steel air fittings are ideal for universal applications, with anodized color coating providing good durability and high scratch resistance. Special design: the hose comes with a stainless steel end brass mnpt 1/4" double rotation. The bend limiter reduces kinking and extends the life of the hose. With very good flexibility in cold weather, polyurethane hoses are perfect for year-round use at temperatures as low as - 20C.