You never want to use a sprout lids that is easy to rust, which will affect the safety of sprouts. So please rest assured to use our germination cap made entirely of 316 stainless steel. From now on, there is no need to worry about the rust on the lid, ensuring the safety of fresh sprouts 【Wide Mouth 】: 316 stainless steel sprouting lids, inner diameter: 2 4/5 in (72 mm), Outer diameter 3 3/8 in (86 mm), perfect for wide mouth Mason jars. A perfect size mesh screen allows easy draining and empty the water from the Mason jars but no loss of seeds. This excellent jar sprouting kit keeps the ventilation and supply the oxygen they need, making germination easier! 【Quantities and Material】: the package comes with 12 PCS lids.Rings are not included. Seeds Sprouting Lids are made of 100% food grade 316 stainless steel, Dishwasher safe. perfect for making organic sprouts in your home or kitchen and supply fresh sprouting constantly. ( Jars and seeds not included) 【Suitable for Wide Mouth Canning Ring】Usually matched with 86mm wide mouth mason jars. Used for filtering, screening, strainering and other functions.