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, won't kink, fast, easy installation. 5 year warranty.