Size Specifications: Diameter of Bottom Dish: 75mm; Height of Bottom Dish: 18mm; Outer Diameter of Upper Lid: 82mm; Height of Upper Lid: 17mm; Thickness: 2mm High Borosilicate Made: High strength, high light transmittance. （pls note that the dropper is not included in the package.） Note: To ensure the flatness of the lid and make it easier to remove or cover, there is a certain gap between the bottom dish and the upper lid. This is normal and does not affect normal use High Temperature Resistance: Up to 401 ° C, Low expansion rate. Please note that our Glass Petri Dishes are NOT resistant to low temperatures and cannot be frozen High Stability: Acid and alkali resistance, high chemical stability. Exquisite Workmanship. The edges and bottom cover are even, smooth and flat › See more product details