Fluidmaster B8F12 Faucet Connector, Braided Stainless Steel - 3/8 Female Compression Thread x 3/8 O.D. Copper Tubing Coupling, 12-Inch Length

This braided hose connector is sold individually and can be used as an extension if the supply tubes on a new faucet are not long enough to reach an existing wall angle stop. It can be used for both hot and cold water supplies. Customers have used it successfully to extend short supply lines, to swap hot and cold water lines, and to connect a faucet to a valve. There are male and female ends, but a reviewer notes that the nut and ferrule can be removed to make any end male. The product generally received positive reviews, although some customers received incorrect fittings or incomplete orders. It’s a simple product that can be difficult to find in brick-and-mortar stores but is useful for DIY plumbing projects.