DescriptionThey are made of premium glass and are designed for the successful conduct of any experiment. They canbe used for bacteria and cell culture. They are optically transparentand have excellent clarity in microscopic examination, allowing you toobserve and conduct scientific experiments in more detail.Features-Color: Transparent color. -Material: glass -Size: 12.00X12.00X1.50cm/4.72X4.72X0.59in -Each petri dish is made of durable glass material and is a useful tool for your scientific experiments. -The clear petri dish is easy to observe the changes of cell culture, and find more fun with your child. -Stable, easy to operate, transparent design will not be confused, easier to carry out scientific experiments. -It is optically transparent and has excellent transparency when inspected under a microscope. -This product set is very suitable for experiments, biology, and microbiology research.