If you use these with tin plated steel lids, the grommets will collect water and encourage rust. You should remove them each time you wash the lid. Stainless steel lids don't have this problem.
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Silicone Straw Hole Grommets for Mason Jar Lids 5 Pack
Thank you for this ingenious invention.
Appreciate the exact dimensions. Not much to say about a gasket. Arrived quickly, doesn't leak.
I was delighted to see how pretty these lids are! It was more than I hoped for! I will order again when the need arises! Thank you!