Welcome to our store! These petri dishes are made of sturdy plastic with smooth surface and solid body. Transparent, convenient, sturdy and efficient. Plastic petri dishes with lid are transparent and uniform in thickness, bottom of petri dishes are flat and smooth without distortion for more accurate quantitative analysis. The lid can be tightened to prevent dust from entering the container. Wide range of uses: Sterile plastic culture dishes for laboratory use. Laboratory tests are suitable for medical, biological and scientific activities, general education, bacteriological laboratories, scientific laboratories and mycological research. Multiple uses: plastic petri dishes with lids are also perfect for lab projects, science school projects, graduation parties, science parties, trade show projects, kids birthday parties, bacteria lab microscopes, graduation ceremonies, Halloween jelly. Packaging: 20 Petri dishes. Colour: clear. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity, please contact the seller immediately. We will do our best to provide you with satisfactory after-sales service.