They are sprouting lids, which are manufactured with premium stainless steel material, practical and durable enough to use.Growing sprouts is like having a little garden in your kitchen that grows the most nutritious greens and vegetables. It is a fun and convenient way to get fresh sprouts on the table every week! Features -Color:Silver -Material:Stainless steel -Size:8.80X8.80X0.20cm/3.46X3.46X0.08in -The sprouting lids are made of food-grade stainless steel, durable and easy to clean, let you enjoy the healthy green food. -The mesh lid provides convenient drainage, which offers adequate ventilation environment for sprout growth. -With this sprouting jar lids kits, you can easily grow fresh bean sprouts at home. -Our sprouting jar lid is perfect for 86mm wide mouth mason jars. -Grow your own alfalfa, broccoli, mung beans, mustard, lentils, peanut, quinoa, chickpeas, green peas and much more.Package list: 5 x Lids