If you have measured the correct Pyrex container that you need a replacement lid for then you should have no problem purchasing this product. It's always nice to have extra covers. I bought these because some of mine were starting to tear down the side. Keep in mind I've had the original covers for 4 years so I'm impressed they haven't had to be replaced for that long. I really like that the lids don't absorb odors. (onions, sauce, dressings). I haven't had a dishwasher in 4 years and have rarely had to wash the lids twice to get rid of the lingering smell. I am already using replacement lids in my new dishwasher and so far they seem to be holding up well!
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