Stainless Steel REPLACEMENT KEG LID: for ball lock and pin lock kegs PRESSURE RELIEF: Built-in manual pressure relief MODIFY EXISTING PIN LOCK KEG: Add a manual pressure relief to your pin lock keg MODIFY EXISTING BALL LOCK KEG: Refresh your ball lock keg with a brand new lid QUALITY CONSTRUCTION: Stainless steel with new O-ring Upgrade your current ball lock keg lid or pin lock keg lid with this universal version! Boasting a manual built-in pressure relief valve. Now you can easily burp or release unwanted gas from your brew. You also save money by not having to switch over to ball lock kegs from pin lock. Or use this to replace your current ball lock keg lid to keep the brew flowing! High-quality stainless steel, easy to use, and comes with a new large lid O-ring.