High Quality Heavy Glass. These glass fermentation weights are made of food-safe glass that is lead-free and non-porous. Therefore, it will never absorb food odors, flavors or colors. Super Value Pack. You get 9 glass weights with easy-to-handle grip. Size: 2-3/4' /7cm in diameter and 1' /2.5cm in height. The weight of each is 7 oz (200g). Upgraded Knob Handle Design. Yesland's smart bulge handle makes it easy to remove these weights from your Mason Jars. Whether it's dry, wet or halfway down a jar. No need to stick your fingers in the fermentation or fumble with a tool. Excellent Universal Fit. Perfect fit for wide-mouth mason jars. And they are much heavier than a typical glass or stone fermentation weight, which works to keep the expanding fermenter perfectly under the brine. Wide Uses. These pickling weights are great for fermenting vegetables, probiotic foods, small batches of sauerkraut, pickles, or other fermented cooking kits.