Replacement 3/8 inch ball valve and racking arm for the Brew Bucket and Brewmaster Bucket. Brewers grade 304 stainless construction. Comes with an external o-ring that seals between the valve and bucket along with an internal o-ring (inside the ball valve) for connecting the racking arm.,3/8 in. tubing works great with a hose clamp and this valve, or use 5/16 in. for a tighter fit.