The valve cores themselves look like they are well made but that hurts the rating as there is no user document to let you know the dimensions. You must try to select the right replacement core as needed. The transparent storage container is broken. up to 10 sections, but it is small so it will be difficult to remove the cores. For $20, it would be worth it if you're willing to take the time to measure the core you take out and choose a new one that's the same shape and size.
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