Feature:1. EASY TO OBSERVE: Laboratory petri plate dish allows you to observe changes in seed or cell cultures under a microscope, which helps to keep trace, and also allows you to mark different samples by writing or labeling on the petri dish.2. HIGHLY TRANSPARENT: Petri dishes are made of plastic material, highly transparent, lightweight but sturdy and unbreakable.3. FLAT BOTTOM: Cell culture dishes are uniform in thickness and have a flat, smoothly bottom, making them suitable for medicine, biological, scientific and other activities.4. APPLICATIONS: Laboratory petri plate dish is suitable for general training, bacteriology laboratory, science laboratory, mycology research, bringing convenience to your life.5. WITH LID: Clear petri dish with lid, convenient for closed culture, 20pcs pack, sufficient quantity to meet your DIY needs.Specification:Item Type: Sterile Plastic Petri Dishes with LidMaterial: PlasticSize: Approx. 9 x 9 x 1.5cm / 3.54 x 3.54 x 0.6in (0.1 to 0.2cm Error in Manual Measurement)Uses: Great for School Projects, Laboratory, Cell Culture, Plant Seeding and Other Science ProjectsLaboratory.Package List:20 xSterile Plastic Petri Dishes with Lid