KZH Fermenting Kit, Mason Jar Fermenting Lids, Fermentation Lids Kit by Matilda one stop shop. 4 airlock fermenting lids fit wide mouth mason jars with Oxygen Pump automatically Vents air

These do exactly what they claim to do. The fit on wide-mouth mason/Ball jars, you use the pump to suck out the oxygen, and then let your foods ferment. The valve keeps the air out but lets the CO2 bubbles out.

The lids fit did not have any problems tightening down. Easy to clean, easy to use the grip makes it easy to take off. I like that it vents by itself. Are you similar ones that tighten on well. Also found similar ones that did not tighten on well. but these are great.

Product does what it says it will is more than adequate

I have fermented vegies for a year using another product similar to this. It recently stopped working--don't know if it's the pump or lid. Could not find it again so I selected this brand. Did it's job with my batch of kraut. This product came with more lids too.

These work absolutely great for fermenting hot peppers, just remember to place the jars somewhere to catch any liquid that might come out during fermenting.

Easy to use and clean. Using this to make sauerkraut and these hold the seal just fine.

Works great for my naturally fermented pickles and sauerkraut. Thanks for a great product

As advertised.