12 pint Mason jars. The volume is 470 ml. These jars are specifically designed for pressure canning, and when you purchase these 12 jars you will also receive the rings and the separate lid plate.
 
The separate lids are officially intended for one-time use and can be purchased separately from us from 2nd half of June. 

However, no one likes disposable use, so we offer an opener in our online store that can open the lid without damage. This allows you to potentially use the lid multiple times.