Braided stainless steel toilet water supply connectors. Nickel-plated brass water supply hex nut. 220' of stainless steel wire per foot ensures high bursting strength. Stainless ferrules are extra long, with radial crimps. Inner strengths, too. Tough, NSF approved polymer core resists chlorine and chloramines. Ample inside diameter for high flow capacity. Captive cone washers seal tightly, can't fall out. Exceptional flexibility for fast, easy installation. Won't kink or crease, even in the tightest of spaces. Heavy-duty nuts are easy-to-grip. Exceeds all requirements for flexible water connectors as defined by ASME A112.18.6 and CSA B125. 5 year warranty.