8 PC SET INCLUDES: (4) Pickle Pebble fermentation weights and (4) Pickle Pipe AirlocksGET THE CRITICAL TOOLS FOR THE HOME FERMENTER: Have pro supplies on hand to convert wide mouth mason jars into maintenance-free vegetable fermenters! Equipment converts 4 jars into fermenters for making nutritious sauerkraut, kimchi, pickles & more!SELF-VENTING PICKLE PIPE AIR-LOCK TOP: These waterless airlock Pickle Pipes bring maintenance-free performance to mason jar home fermentation - so you'll never have to burp or monitor your ferments or worry about contamination again.EASY-GRIP SODA GLASS WEIGHTS: Pickle Pebbles are easily removed by pinching the handy finger grip and lifting them out. Simply fill jars with veggies etc. & salt or brine and apply weights & airlock lids. Pickling has never been easier!DIMENSIONS: Pickle Pebbles measure 2.75" in diameter by 1.1" high with a weight of 6 oz, each. Pickle Pipes measure 3.31" in diameter. Just right for your wide mouth mason and canning jars (Bell, Kerr, Bernardin, etc).DISHWASHER SAFE: The premium quality silicone Pickle Pipes can go into the top rack of the dishwasher.FOOD SAFE MATERIALS: Materials include food-safe glass and silicone. BPA-Free and Phthalate-Free.CARE INSTRUCTIONS: Pickle Pipes can be washed by hand or in the dishwasher. Pickle Pebbles can be washed by hand with dish soap or in the top rack of a dishwasher, without any extreme heat settings (ex. steam). Pickle Pebbles cannot be boiled for sterilization.