The ProSource KYSL042 toilet supply line is a flexible connector engineered to provide a secure and leak-free connection between the household water supply shut-off valve and the toilet fill valve. This 20-inch supply line features a 1/2-inch compression fitting for connection to the stop valve and a 7/8-inch ballcock nut designed for the toilet fill valve. Its construction includes a Grade 304 stainless steel braided exterior, which offers enhanced durability and resistance to kinking and crimping. The inner core is typically made from non-toxic PVC or polymer materials, designed to withstand chlorine and chloramines. The fittings incorporate brass nuts, commonly with a chrome-plated finish for the ballcock connection and nickel-plated hex nuts for the compression side.