sportuli Silicone Fermentation Lids with Steel Ring 5 Sets Waterless Airlock Wide Mouth Mason Jar Fermenter Caps for Pickle Sauerkraut Kimchi and Fermented Probiotic Food

The high-qualitysilicone wide-mouth bottle fermentation vent Automatic venting ? No need to burp jars daily to release excess pressure and maintain water levels. Fits Any Wide Mouth Mason Jar ? With a size of 3.3'' diam , each lid is perfectly suitable for all wide mouth mason jars. cap can be ventedunidirectionally, and it needs to be used with a ring. After the cap is closed,when the air pressure in the bottle reaches a certain pressure, it willautomatically overflow through the round hole cross slot , While preventingoutside air from entering the bottle, making sauerkraut, salsa, kimchi, etc.,even the fermentation of fruits or any fermented vegetable probiotic food. How to Use: Put veggies, and brine into your Mason jar, and let the brine submerge the veggies Put the lids on and screw the ring then done. No burp, No daily maintenance. Just leave the jar in a shade cool place. Package Include: 5 x Silicone airlock fermenting lids. 5 x Metal rings