Optically clear Petri dishes made of food grade polystyrene plastic for heavy duty use. Sterilized with ethylene oxide, no ventilation, 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, bacterial laboratories, science laboratories and mycology research. They are also very suitable for school-age children. , Children's science birthday party, Bacteria laboratory 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 avoid condensation on the lid of the Petri dish. Color: transparent. The transparent lid allows you to mark the contents and conditions from the outside to measure growth. Shape: round. Size: about 90 x 15 mm (diameter x height) Function: Grow fungi, bacteria and other microorganisms. The science experiments for kids are designed to monitor the growth of plant seeds in different contents and environmental conditions, so that your children can feel that professional scientists have their own Petri dishes! Perfect for science-themed birthday and graduation parties! Very suitable for microscope science, art projects, Halloween celebrations, mycology research Children's accessories, 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! Clear 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 gel. There may be some odor when receiving the goods, because 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. becomeveryrich