[Material] A petri dish or petri plate is a shallow transparent lidded dish. These clear culture dishes are made of thick-grade polystyrene, sturdy and durable, with a smooth and highly transparent surface for clear visibility. They meet standard quality requirements to support accurate quantitative analysis and testing. [EO Sterile] These laboratory petri dishes with lids are ethylene oxide sterilized, ensuring a safe and contamination-free environment for use. Made of polystyrene plastic, they are suitable for various microbiological applications including mycology, liquid culture, agar plates, and bacterial science studies. [Package] The product size and packaging include plastic petri dishes with vented lids. The vented lid design allows for improved gas exchange, and the dishes are stackable for efficient storage. [Applications] These sterile petri dishes with lids are ideal for laboratory analysis, school science projects, science-themed activities, biological research, mycology studies, general training, and other educational or scientific applications. Color: Transparent Material: Plastic Size: 60 x 15 mm Package Contents: 30 x Plastic Petri Dishes Only the above package content is included; other items are not part of this package. Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.