KIT INCLUDES: 4 BPA Free Water Airlocks; 4 Glass Canning Weights; 4 Stainless Steel Wide Mouth Lids with Silicone Gaskets; 4 Silicone Grommets (A bonus of ferment recipe and 2 extra silicon grommets); All Essential Fermentation tools Included. | STAINLESS STEEL FERMENTATION LIDS: Unlike the metal lids and band that come on the jars, our lids are made of stainless steel, so they won't rust. The lids have a silicone ring/seal underneath to make things airtight. Completely BPA-free, food-grade & dishwasher safe. | WELL MADE & EASY CLEANING: The 3-piece fermentation airlocks are made from PP plastic that are BPA free. They can be disassembled and are easier to clean than the "S" type ones. WARNING: Please do not wash them in boiling water. | HEAVY ENOUGH & EASY GRIP WEIGHTS: Weight approximately 7.4 ounces/each (210 grams), a lot heavier than others, which works to hold the expanding ferment perfectly under the brine. Upgraded with 1 inch long bulge, knob handle, makes it easy to put in and out. | 100% MONEY BACK GUARANTEE: One year free Guarantee - if any small parts damaged during delivery, we can change into new one within one year. Our pickling kits fits any brand of Wide Mouth Mason jar in pint, quart, or half-gallon. Great set for fermenting starter, such as Sauerkraut, Kimchi, pickles or any fermented probiotic foods.