Feature 1High Quality Materials: This glass culture dish is made of high quality borosilicate glass, which is acid and alkali resistant and highly stable. 2Experimental Projects: Glass Petri dishes are ideal for industrial experiments, classroom teaching experiments and fun experiments in the home, of course, the product itself is very safe, so the product is known to be safe at the same time to ensure the safety of your own experiments. 3Product Size: The size of our glass petri dishes is standard, the inner diameter of the top lid is 57mm, about 2.24 inches, and the inner diameter of the base is 63mm, about 2.48 inches 4Easy Storage: Glass Petri dishes are available in complete product sets and are very well sealed, which means they are easy to store 5Package Contents: Sold in packs of ten, containing ten glass dishes with lids, with excellent heat and chemical resistance, and our glass dishes support reuse many timesSpecificationItem Type: Glass Culture DishMaterial: Borosilicate glassUse: Widely used in science projects, fun exhibition projects, theme parties and classroom activitiesTop Lid Inner Diameter: Approx. 57mm / 2.2inBase Inner Diameter: Approx. 63mm / 2.5in .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List10 x Petri Dish Holder10 x Petri Dish LidNoteThis product is a glass product, please do not place it on the edge of the high table to avoid shattering