
These are counterfeit VacUVin seals. They are made of plastic, not rubber. They are black, not grey. They have 3 holes, some are completely closed, not four open holes. They have a terrible plastic smell. It's anything but real. DO NOT BUY THIS ITEM FROM THIS SELLER. You get what you pay for. TO UPDATE. I have found that there are competing brands and they are similar to those competitors' products, not VacUVin. I have tried these plugs and they work as well or better than the original gray VacUVin plugs. The bottom line is that these are counterfeit VacUVin corks, but it's possible they are genuine competing brands. I like the design of these black caps better as the part that is in the bottle has three rings instead of one ring built into the cork for a better seal. So I raised my rating from 1 to 5.

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