1. Made of high-quality stainless steel, corrosion-resistant, high-temperature resistant, and durable. 2. It's a simple way to carbonate your fermented beer or oxygenate your beer during online fermentation. 3. Two sizes are available: 0.5 micron and 2 micron stones; you can choose the one you need. 4. Reduced fermentation time: quickly oxygenates wort and beer/soda
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