Our professional petri dishes are made of glass material, and in transparent design, easy for observation. Suitable for laboratory or school experiment, biological and scientific research, etc. Good educational supplies for students, applicable for cell or culture, uniform thickness, light and thin, more practical. Features - ColorTransparent - Material: Glass. - Size: 6.50X6.50X1.80cm/2.55X2.55X0.71in. - Professional and practical design with highly transparent design, easy to use and observe. - It is manufactured with premium glass material, reusable and applicable for many experiments. - Easy observation, lightweight and thin, applicable for cell or culture. - Good laboratory accessories, flat and smooth bottom, easy to clean, no secondary pollution. - Suitable and wonderful for laboratory experiment, biological and scientific research, etc. Package list: 5 x petri dishes