Don't spend money on a new keg beer faucet, fix your existing faucet with a replacement front seal O-ring. This O-ring is a replacement part for any Perlick 600 Series Keg Beer Faucet. Perlick 600 Series faucets feature a seal near the spout of the faucet instead of the rear of the faucet like most other designs. The front seal O-ring is a vital piece in your faucet as it ensures that minimal faucet area is being exposed resulting in no space for mold and bacteria to grow in the faucet. Replacement O-rings are great to have on hand to ensure your beer faucet is always ready for use.