Thick Glass: Package includes 4 pcs fermenting glass weights, weights 7 OZ, heavy enough and flat bottom to keep your ferment under the brineInnovative Non-slip Grip Design: For wide mouth mason jars ribbed handle makes removing the weights much easier than other designsFit Wide Mouth Mason Jars: With a 2.7” diameter, these Glass Weights are specifically designed to fit all wide mouth mason jars,making them just right for small batches of fermented veggies and improving the entire fermentation processClear & Smooth Glass: Smooth glass with no seams and the flat bottom to avoid air bubbles forming underneathPackages in Box: Our glass weights are packaged in Box to Keep them better protected