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Your cart is empty.Product size; 4.5 x 1.45 x 0.31 inches Product weight; 6.17 ounces Product quantity; this product has 6 plastic air locks, 18 silicone black buckles Buttonhole material: silica gel, outer diameter 15mm, inner diameter 8mm, thickness 6mm Main function; The air lock kit can be used as a multi - functional fermentation equipment for preservation and fermentation for various purposes, such as preservation of food and fermented kimchi; spicy cabbage, sauerkraut, wine, beer, cider, etc. Maintain good sealing: easy to use and clean, just drill a suitable hole in the fermenter cover (according to the size of the air valve), then insert the black grommet into the cover hole, and insert the tapered air lock The grommet hole is well sealed and fermented to prevent oxygen from damaging the fermentation and beer brewing process.