1 set of 6 Wide Mouth or Regular size. These lids are pressure cooker safe PP5 plastic lids. PP5 plastic will withstand high temperature and pressure and is the "go to" standard amongst mushroomers. Specifically designed to fit common canning jars of the wide mouth variety. PTFE 13mm/.22 um filter (sealed) and 20 mm self-seal injection port installed. Completely leak proof. Each lid comes with a removable silicon gasket. **Sale is for lids only (Jars not included). FAST  SHIPPING.