Don't spend money on a new keg beer faucet, fix your existing faucet with a replacement pivot ball O-ring. This pivot ball O-ring is a replacement part for any Perlick 600 Series Keg Beer Faucet. The O-ring is a vital piece in your faucet as it ensures that the seal on the pivot ball is a tight, leak-free seal resulting in a perfect pour every time. The 600 Series Faucets rely on the pivot ball and O-ring to eliminate the need for a valve shaft. Replacement O-rings are great to have on hand to ensure your beer faucet is always ready for use.