Lasco 10-0613 Water Supply Flex Stainless Steel Braided With Poly Inner Core 3/8-Inch Female Compression X Female Ballcock plastic Nut X 12-Inch. 3/8-Inch compression x ballcock x 12-Inch . Stainless steel braided supply. Use to connect most toilets to water source. Lead free product. meets California AB-1953. Vermont. and new federal standards for low lead applications. Uniform Plumbing Code (UPC) certified and approved - Industry standard ensuring product quality and safety.