【FDA Transparent Upgrade Airlock】Compared with other airlocks for fermenting, it is stronger, more transparent, and made of food-grade materials. You can easily see the entire fermentation process, they can last for a long time, because they are the top FDA transparent airlock! 【Multifunctional use】 The air lock can be used for various fermentation projects to preserve food. As a brewing airlock, craft beer, wine, sauerkraut, kimchi, cider, fruit wine, rice wine, broccoli, carrot and ginger, and kimchi are brewed 【Package content】 4 fermentation airlocks, size: height 6.7 in/17 cm. 4 No. 6 fermentation stoppers, size: top diameter 1.3 in/3.3 cm, bottom diameter 0.98 in/2.5 cm, Height is 1in/2.6cm. 8 airlock grommets, size: inner ring diameter is 0.39 in/1 cm, outer ring diameter is 0.59 in/1.5 cm, the quantity is sufficient, As a spare, the price is right 【Good airtightness】 The good airtightness of the fermentation airlock makes fermentation easier, effectively isolates the air and prevents oxidation. Automatic exhaust at room temperature without manual control › See more product details