Jar is labeled and you can see that the center button of the lid is depressed so that it is perfectly sealed!

ALTITUDE CHART
For Boiling Water Processing

If you are preserving at an altitude higher than 1,000 feet above sea level, adjust boiling water processing time as indicated.

ALTITUDE CHART
For Pressure Canning

If you are preserving at an altitude higher than 1,000 feet above sea level, adjust pressure pounds as indicated.