Kiss Your Buckling Woes Goodbye … Cheap is expensive. Don’t settle for jar lids for canning that end up buckling. Our mason lids are made of premium reinforced metal that costs 2X as much as ordinary tin. The result? You won’t waste a single one. Eye-Catching Hues You'll Love ... Who said canning can't be striking! This is the only colored canning lid set to give you a variety of colors. We've included blue, teal, silver, and purple lids for mason jars to add beauty to your pantry (25 of each). Seal in the Deliciousness ... Canning takes lots of love and time; don't let it go to waste. Hugs & Kitchens regular mouth canning lids stand out with a thick silicone gasket that creates a 100% airtight and leak-proof seal to keep the deliciousness intact. Your Jars Just Found their Match ... No more guesswork. We've carefully crafted these lids to fit most Regular-mouth mason jars on the market, including Ball and Kerr. Each lid measures 2.75" inches in diameter for a spot-on fit. For one-time use only.