Lasco 10-2621 Water Supply Flex Braided Vinyl 3/8-Inch Female Compression X Female Ballcock Plastic Nut X 20-Inch. 3/8-Inch compression x ballcock x 20-Inch . Braided vinyl 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.