The product is a case of 500 plastic petri dishes with a diameter of 50mm and a depth of 11mm. Made of polystyrene, these petri dishes are in unopened plastic sleeves and are intended for use in various disciplines such as physical laboratory, immunology, hematology, oncology, veterinary medicine, medical laboratory, microbiological laboratory, and biological laboratory. Originating from the United States, these petri dishes provide a sterile and convenient environment for scientific research and experimentation.