Cylinder Fermentor Airlock with Grommet — 5 PK, 3‑piece design A dependable airlock solution for homebrew beer and wine fermentation. This 3‑piece cylinder airlock with included grommet provides a simple, effective way to vent CO2 while helping protect your fermenting batch from outside contaminants. The 5‑pack gives you spares for multiple fermenters or ongoing batches. Key benefits Prevents contamination: allows fermentation gases to escape while minimizing the chance of airborne yeast and bacteria entering the fermenter. Easy to use and maintain: three‑piece design disassembles quickly for cleaning and sanitizing between batches. Practical spare supply: five airlocks in one pack means you have replacements on hand or can outfit several fermenters at once. Secure fit: includes a grommet to help form an airtight seal at the fermenter opening. Key attributes Quantity: 5 pack Design: 3‑piece cylinder airlock (simple assembly/disassembly) Includes: grommet for sealing on the fermenter Intended use: homebrew beer and wine fermentation Function: one‑way venting of CO2 during active fermentation Typical use cases Homebrewing beer: use during primary and secondary fermentation to vent CO2 while protecting the batch from oxygen and contaminants. Winemaking at home: fit to carboys or buckets with the supplied grommet to manage active fermentation and reduce infection risk. Replacement and backup: keep a set of five airlocks on hand so you can rotate, worn parts, or run multiple batches simultaneously. Care and use tips Install the grommet securely in the fermenter opening before inserting the airlock. Disassemble the 3‑piece airlock for cleaning and sanitizing between uses. Check seals and grommet condition before each batch and if worn. Simple, practical, and ready to use with your homebrew beer and wine projects, this 5‑pack of cylinder fermentor airlocks with grommet keeps fermentation controlled and low‑risk without unnecessary complexity.