One-Piece Mason Jar Sprouting Lids - fits wide mouth mason jars (Ball, Kerr, Golden Harvest, Anchor Hocking, Bernardin and Kilner), from half a pint (8 oz) to half a gallon (64 oz). Wide mouth mason jars have an outer diameter of 3 3/8". Perfect Size of Draining Holes (1mm x 1mm) - allow to grow large beans or small seeds (e.g. alfalfa & broccoli sprouts). Maximum Airflow & Drainage - unlike plastic lids, stainless steel lids have better drainage and airflow. Dishwasher Safe - unlike plastic sprouting lids, stainless steel sprout lids are safe for dishwashing and sanitizing in boiling water or weak acid (vinegar, citric acid). Plastic lids will degrade with hot water or acid and release even more questionable substances and microplastic into your sprouts. Highest Food Grade Material - 316 Stainless Steel is used in biomedical applications & has the best rust-proof properties, moisture tolerance, strength & food safety. Heavy Duty & Durable - our stainless steel sprouting tops will not break, discolor and degrade like plastic sprouting lids. Plastic sheds microplastics and leach questionable substances, pollute the environment and kill wildlife. Multi-purpose - great for straining liquids from cans, homemade liquids from your mason jars (e.g. teas, vegetable broth, juice), sifting and filtering (e.g. flour, food powders), and even use as a shaker. Plastic-free - Phthalates-free, Bpa-free, PVC-free One-Piece Stainless Steel Sprouting Lids Design - will make your sprouting journey much easier Lifetime Manufacturer Warranty - we care for the environment, so we manufacture quality reusable zero-waste products for life. Plastic-free Packaging - packaged in 100% recyclable paper box. All EcoPeaceful products are packaged plastic-free. One-piece Mason Jar Sprouting Lids. Fits wide-mouth mason jars (Ball, Kerr, Golden Harvest, Anchor Hocking, Bernardin, and Kilner), from half a pint (8 oz) to half a gallon (64 oz). Wide-mouth mason jars have an outer diameter of 3 3/8". Perfect Size Of Draining Holes (1mm X 1mm) - allow to grow small seeds (e.g. alfalfa & broccoli sprouts). Rust-Proof 316 Stainless Steel. Dishwasher Safe. Plastic-free Packaging.