Description Scientific experiment supplies specifically for children to monitor the growth of plants under different content and environmental conditions, so that your child feels like a professional scientist has his own petri dish!All items in this set are made of safe plastic, durable, reusable and environmentally friendly. Features - Color:Transparent.- Material:Plastic.- Size:9.00X9.00X1.50cm/3.54X3.54X0.59inch.- This petri dish is in 90mm sizes, disposable design, enough quantity for your to use.- Every petri dish made of durable plastic material, which is a useful tool for you in science experiment.- All items in this set are made of safe plastic, which are durable, reusable and eco-friendly.- Of course, you can dispose them after experiments where cultures might contaminate each other.- This product set are perfect for experiment, biology, microbiology studies.Packing list: 30 x petri dishes (90mm)