1、10PCS PETRI DISH: Including 10pcs laboratory glass petri dishes, equipped with covers, which has sufficient quantity for easy use and replacement. 2、GLASS MATERIAL: Made of excellent borosilicate glass, with thickened wall, which is acid and alkali resistant, has good stability and long service life. 3、WIDE APPLICATION: Can be used for industrial and chemical experiment, science project, fun exhibition projects, theme parties and classroom activities, etc. 4、STANDARD SIZE: The inner diameter of the lid of the petri dish is 85mm, the inner diameter of the base is 94mm, has standard size and good sealing. 5、GLOSSY SURFACE: These experiment petri dishes have flat, glossy surface that allows cells to grow evenly without clumping, providing good protection. 10 x Petri Dish Bases10 x Petri Dish Covers Item Type: Petri DishMaterial: GlassUses: Widely used for science projects, fun exhibition projects, theme parties and classroom activitiesUpper Lid Inner Diameter: Approx. 85mm / 3.35inBase Inner Diameter: Approx. 94mm / 3.7in