BPA-FREE & FOOD-SAFE QUALITY: Our fermentation lids are made from stiff, durable plastic with a thick, leakproof gasket, and the food-safe fermentation kit makes an excellent choice for providing the healthiest, nutrient and probiotic-packed fermented goods to you and your family. Easy to clean, use and open, our leak-proof fermenting lids are equally great for any beginner or pro fermentation enthusiast CONVENIENTLY DESIGNED FERMENTING WEIGHTS: Our fermenting kit also comes with 4 free fermentation weights, effectively keeping ferments submerged below brine for best results. Features 1 handle on the top for effortless placement and removal WITH BUILD-IN DATER TRACKER: To easily keep track of each fermentation batch, our fermenting jar lids come with a date setter to eliminate guesswork ENJOY HASSLE-FREE FERMENTING: This mason jar fermentation lids let gas escape but keep mold and bacteria out. No need to add burp lids to your jars or deal with water airlocks. Features a built-in date dial and pull tabs. This unique pickling kit fits perfectly on wide-mouth mason fermenting jars 100% SATISFACTION GUARANTEE: With each kit, you’ll get four lids that are compatible with the wide-mouth jars, four Fermentation Weights that keep vegetables submerged below brine and a vacuum pump to help you remove air from the jars after tasting. 100% Money-Back Guarantee