[10 Drin Glass] Laboratory Drin is made of High-quality materials. It can be reused and can be sterilized at high pressure. [Easy to observe] Due to high parency, you can easily and clearly observe the sample under a microscope. [5mm vaccination ring] the inoculation ring is made of durable High-quality materials. [Application] Very suitable for laboratory analysis, biological, scientific laboratories, children's school projects and other activities. [Including packaging] 60mm x 15mm Petri Dish Glass (10); 5mm for vaccination ring (1). We use PE foam and cardboard packaging to protect the petri dish glass from being damaged during portation, don't worry! size: 60mm Material: Glass colour: parent Package Contents: 10 x Petri Dish Glass 1 x inoculation loop Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.