No-Burst connector. 1 connector fits 4 shut-off valve sizes: 3/8", 7/16", 1/2" Male compression and 1/2" Male iron pipe. 7/8" Female nut with ballcock thread on other end. Stainless steel connector with nickel-plated brass water supply hex nut. Stainless ferrules are extra long, with more crimps. Exceptional flexibility for fast, easy installation. Won't kink or crease, even in the tightest of spaces. Heavy-duty nuts are easy-to-grip with finger or tools. 10 year warranty.