Danco 35725B Round Rubber O-Ring 3/8 I.D. x 9/16 O.D. in. (Pack of 5)

Danco o-rings will repair your leaky faucet and prevent future leaks. Faucets usually have one or more o-rings to prevent water from leaking out around the spout. Replacing worn-out o-rings is an inexpensive alternative to replacing the entire faucet fixture and is an easy DIY installation.