Features Pack of 10 petri dishes: contains a 10-piece laboratory glass petri dish with lid, sufficient quantity for easy use and replacement, should bring convenience to your life. Glass material: high-quality borosilicate glass, thickened wall, acid and alkali resistance, long service life, stable performance and strong practicality. Wide application: it can be used in industrial and chemical experiments, science projects, interesting exhibition projects, theme parties and teaching activities, etc. with a variety of functions and obvious effects. STANDARD SIZE The inner diameter of the petri dish cover is 85mm and the inner diameter of the base is 94mm, standard size, good sealing, 100% new and high quality, reliable and safe. Glossy surface: these laboratory bowls have a flat, smooth surface that allows for uniform growth of cells without clumping, provides good protection and is small, lightweight and easy to carry. Specification: Item Type:Petri Dish Material: glass. Usage: widely used for science projects, entertaining exhibition projects, theme parties and teaching activities Inner diameter of top lid: approx. 85 mm / 3.35 inches. Base inner diameter: approx. 94 mm / 3.7 inches. Package list: 10 x Petri dish base. 10 x Petri dish covers Note: This is a glass product, please do not put it on the edge of the high platform to avoid breaking. Package List 10 x Petri Dish Bases 10 x Petri Dish Covers