Pickle Pebbles - Glass Fermentation Weights for Small-Batch Mason Jar Fermentation - Standard Size - 4 Pack INCLUDES 4 PICKLE PEBBLES  FITS ANY SIZE OF REGULAR/SMALL MOUTH MASON JAR, Including Ball, Kerr and Bernardin PREVENTS SPOILAGE  Keeps Fermenting Vegetables Submerged Under Brine to Prevent Oxygen Exposure to Yield Safe, Delicious and Healthy Ferments FOR MASON JARS  Specially Designed and Perfectly Weighted for Fermenting Small Batches in Mason Jars NEW DESIGN  Featuring Crystal-Clear Glass for Improved Visibility and a Beveled Masontops Emblem SPECIFICATIONS  2.25" Diameter x 0.75" Thick; Weight of 100 Grams (Only One Weight Needed Per Jar) Pack veggies and brine into Mason jar with 1.75 headspace Place Pickle Pebble into mouth of Mason jar; ensure it&#039;s slightly submerged Remove any food that floats to the surface Top off the jar with your chosen airlock or lid The Pickle Pebble will keep your veggies submerged and safe below the brine Exposure to oxygen causes mold; Pickle Pebbles eliminate this risk by weighting food below brine Pickle Pebbles save time and money by preventing spoilage Pickle Pebble glass weights are specifically designed for Mason jars They are made of food-safe soda lime glass