Set Of 4-Each set includes 4 stainless steel rust resistant sprouting insert lids(2.56 in (65 mm) inner) and 4 stainless steel bands( 2.75 in (70 mm) outer diameter) perfect for regular mouth mason jars,canning jars,kerr and bernardin.Food Grade Material-Made of 304 Stainless steel ring and a 316 surgical stainless steel mesh is anti-rust and last longer than the ordinary one. Surgical stainless steel is used for making surgical instruments because it has the highest level of corrosionprotection,while the ordinary canning jar are just steel,they quickly rust,taint your sprouts and stain your sprouting screens when you use them for sprouting in your kitchen at home .Multipurpose-With the four regular mouth lids in each set, so you can grow a variety of sprouts and keep a constant supply on hand. Grow your own organic broccoli sprouts, lentil spouts, bean sprouts and other favorites at home in your kitchen for thefreshest sprouts at fraction of the grocery store price.Also,in addition to sprouting jars, these lids can be used to make spice, sugar,flour or glitter sprinklers,sifters, strainers and potpourri jars.Easy TO Use & Reusable-Our screens are band-free for easy cleaning and food safety. The rings and screens separate easily for quick cleaning and It can be boiled and sterilized after each use and are fully dishwasher safe.One-Size Fits Any Regular Mouth Size Mason And Ball Jars-The sprout maker lids fit perfectly for the regular mouth cup (8 oz), pint (16 oz), pint-and-a-half (24 oz) or quart (32 oz),not for the wide mouth mason jars.