The Weekend Brewer Ball Lock Keg Posts Set Stainless Steel (Both) Purchase these keg posts to replace worn out posts that no longer seal properly. Made of 304 stainless steel for proper sanitation and unmatched durability. Poppet valve ensures you get a tight seal every time These work great with cornelius style kegs. Not compatible with firestone, hoover, and spartanburg kegs This variation is for both gas and liquid posts. Threads spec: 19/32"-18 The Weekend Brewer is a homebrewing brand based in Fayetteville, AR. It's brewing made easy.