The Masontops Pickle Pipes Waterless Airlock Fermentation Lids are a set of 4 silicone lids designed for wide mouth jars. These round, multicolored lids feature a compact design and are microwave and dishwasher safe. With a diameter of 2.68 inches, these lids are perfect for airlock fermentation and are made of durable silicone material. The set includes everything you need to start fermenting your favorite pickles with ease. Made in China, these lids are a convenient and practical addition to any home kitchen.