Small Universal Stopper with Hole for Airlocks This small universal stopper with hole gives brewers, winemakers, cider makers, and mead makers a flexible closure for compatible small vessels that use an airlock. The tapered shape can fit a range of vessel mouths when the vessel and stopper sizes match. Use it for small fermenters, jugs, test batches, yeast starters, and fermentation experiments where a fixed numbered stopper is not the best fit. The drilled center hole is intended for standard fermentation airlock use when the airlock stem fits correctly. Best Uses Small fermentation vessels: useful for compatible jugs, small carboys, and test fermenters. Airlock setup: drilled center hole supports standard airlock use where sizing fits. Trial batches: practical for beer, wine, cider, mead, starters, and small fermentation experiments. Spare closure: good to keep on hand when switching vessels or replacing worn stoppers. Fit and Sanitation Notes Always test the fit dry before sanitizing and filling the vessel. A stopper should sit firmly without being forced so tightly that it becomes difficult to remove or pops loose during fermentation. Clean and sanitize both the stopper and airlock before use. For vigorous fermentations, use an appropriate blowoff setup if an airlock may not have enough capacity. For related supplies, browse our fermenters and accessories and brewing equipment collections.
