Stock up on canning supplies! These flat metal lids fit standard (not wide-mouth) or wide-mouth canning jars, including our Jelly Jars, Pint Jars, and Quart Jars. Also compatible with most regular mouth and wide-mouth canning jars on the market. The flat, metal lids have a rubberized ring that softens and seals when placed on the glass jar and heated, creating a safe, secure, air-tight seal. Intended for single use when canning; replace with fresh lids for each new batch. The shiny silver lids are printed with our logo and have plenty of room for writing contents and the date.Specifications and Features: Metal Includes 12 disposable lids Fits most standard canning jars Fits most wide-mouth canning jars BPA free