Optically clear Petri dishes made of food-grade polystyrene plastic for heavy-duty use. Sterilized with ethylene oxide, vent-free, with lid, smooth surface and better transparency. Sterile design for laboratory use. Laboratory tests for medicine, biology, science, and other research are suitable for general education, bacteria laboratories, science laboratories, and mycology research. They are also very suitable for school-age children. , Kids Scientist Birthday Party, Bacteria Lab Microscope Science Class, Chemical Engineering Graduation Party, Treat Me Mark the experiment number on the bottom of each Petri dish. If the lid is separated, the culture can still be identified. Store upside down to prevent condensation on the Petri dish lid. Color: Transparent. The transparent lid allows you to mark the contents and conditions from the outside to measure growth. Shape: Round. Size: Approx. 90 x 15 mm (Diameter x Height) Function: Grow fungi, bacteria, and other microorganisms. Kids' science experiments are designed to monitor the growth of plant seeds under different contents and environmental conditions, so your children can feel that professional scientists have their own Petri dishes! Perfect for science-themed birthday parties and graduation parties! Very suitable for microscope science, art projects, Halloween celebrations, mycology research Accessories for Children, independent transparent window design, easy to grasp, no more dust. Package Included: 20 x Plastic Petri Dishes Reward: 20 packs of 3ml disposable pipette transfer tips, more value! Transparent and flexible plastics are ideal for transferring, mixing, and measuring liquids. Hint: Mark the bottom of each Petri dish with the experiment number. If the lid is separated, the culture can still be identified. Please note that these Petri dishes are empty and do not contain nutrient agar. There may be some odor when receiving the goods, as it is original, and the odor will disappear after a few days in a ventilated place. Since the measurement method varies from person to person, there may be a difference of 1-2 cm.Good quality product