In the world of seals, gaskets, and O-rings, picking a replacement pressure canner gasket usually comes down to one question: will it fit your Mirro without turning into a guessing game? The useful payoff here is a single replacement gasket that lists compatibility across several Mirro models and gives you a concrete size to match against your lid, all at a set price.
Quick Verdict
If your Mirro pressure canner is a 12, 16, or 22 qt model and your model number falls into the M-0512, M-0522, M-0312, M-0406, M-0416, M-0526, or M-0622 family, this $17.89 replacement gasket is a straightforward pick. It is matte black and listed at about 12.6 inches in diameter.
Who It Suits
This gasket suits anyone replacing an old Mirro pressure cooker gasket who wants a part that covers multiple canner sizes without buying a new lid. It also handles Mirro model numbers with suffixes like -11 or -35, since versions such as M-0512-11 are included.
What Stands Out
The food-grade silicone construction is the main draw: it is lightweight, resistant to high temperatures, and tough, which matters for a part that has to hold cooking pressure. The compatible models span several Mirro model numbers, and the roughly 12.6-inch diameter gives you a concrete measurement to compare with your lid.
Meaningful Trade-Offs
Fit is the real variable. A gasket can look right and still not seal if your lid groove doesn't match the ring. Also, this is a single gasket, not a multi-pack, so if you plan to refresh two canners, you will need two of them. Since it's a single gasket, you won't have a spare waiting in the drawer for the next time you need one.
Replacement Gasket for Mirro Pressure Canner, Compatible with 12/16/22QT Models

For someone replacing an old, worn seal on a compatible Mirro canner, this gasket is a straightforward option. The silicone's high-temperature resistance and toughness are good signs for regular canning use, and the trade-off is that the seal only works if the ring and your lid groove line up.
Bottom Line
For $17.89, this gasket is a sensible pick when you have a Mirro pressure canner in the 12, 16, or 22 qt range. The food-grade silicone is a practical choice for this kind of replacement. If your model or lid channel falls outside that picture, keep looking.