I bought a bunch of these hats at the end of 2020 because I was desperate. I received broken, old looking ball top boxes, but the tops inside looked fine. So far I've used 140 of these with no lid breakage (seals were perfect). I used the autoclave at 13# for 75 minutes which brought the core temp to around 240 degrees. Q. They weren't my "balls" but they turned out fine. None of the jars showed any sign of forged or broken seals after 6 months on the shelf so I think the quality is fine. I have just purchased this year's supply and am looking forward to another successful canning season. My advice: try them, but test each one if you wash them before canning, and if you can just use a double boiler I don't think you'll have a problem. Have fun preserving!
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