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. 1/2" Female pipe straight threads (to fit faucet shank) on other end. Stainless steel connector with nickel-plated brass hex nuts. 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 brass hex nuts are easy-to-grip with fingers or tools. 5 year warranty.