Crystal Knob Canister Lids for Regular Mouth Mason Jars (2 Pack, Gold) These elegant crystal knob lids will turn your ordinary regular mouth (2 3/8" internal diameter) Mason jars into objects of beauty! Perfect for kitchen canisters, crafts, storage, gifts, decor, and everything else. The crystal cut plastic spheres look so pretty as they catch the light! Add our silicone lid liners (sold separately) to make them airtight, leak proof, and food safe! They were not specifically designed for these lids, but they fit well enough to seal well and not fall out of the lids easily. The lids are made of tin plated steel with a plastic knob. Your entire Mason Jar Lifestyle order ships for a flat $3, or free over $35. Check out our other products! Ships same or next day via USPS First Class from Denver, CO.