A simple, reliable airlock designed for homebrewing and smallscale fermentation. The twinbubble, 4piece construction lets fermentation gases escape while preventing outside air and contaminants from entering your fermenter — helping you protect flavor and finish with an easytouse, easytoclean tool. Key benefits Protects your batch: Allows CO2 to vent and keeps oxygen, dust, and microbes out during active fermentation. Visual fermentation indicator: Twinbubble design makes activity easy to monitor at a glance. Easy to use and maintain: 4piece construction disassembles quickly for cleaning and reassembly without tools. Secure seal: Includes a cap and grommetcompatible design to form an airtight fit on common homebrew stoppers and fermenter necks. Features and attributes Design: Twinbubble airlock with a simple 4piece configuration for straightforward assembly and cleaning. Functionality: Oneway venting system — fermentation gas escapes while outside air and contaminants are blocked. Included components: Cap for splash protection and to limit evaporation; grommetcompatible connection for a snug fit. Compatibility: Intended for use with homebrew fermentation vessels that accept grommetstyle airlocks and stoppers. Size and handling: Compact and lightweight — unobtrusive on carboys, buckets, and other fermenters. Performance: Reliable, reusable performance for repeated batches when cleaned and maintained properly. Use cases Beer fermentation: Fit the airlock to a sealed stopper on a carboy or bucket to let CO2 vent during primary and secondary fermentation while keeping the must and wort protected. Wine making: Use during primary fermentation and racking to prevent oxidation and contamination while allowing gasses to escape. Smallbatch fermentations: Suitable for mead, cider, or other smallbatch fermentations that require a controlled, oneway gas release. Practical tips Assemble and fill the central chamber with water (or sanitizer solution) to the recommended level before use to create a functional seal. Disassemble after each batch for a thorough clean; the 4piece construction allows easy access to all surfaces. Use the included cap to reduce splashing and limit evaporative loss during vigorous activity. What to expect A straightforward, dependable airlock solution tailored to homebrewers and smallscale fermenters. The twinbubble design provides clear visual feedback on fermentation activity, the cap and grommetfriendly connection help maintain a secure seal, and the simple 4piece construction keeps cleaning and reuse convenient.