Safe Material: Glass are made of borosilicate glass, transparent, easy to clean and reusable; can withstand high temperatures up to 300C, but cannot be used for heating Small size: glass with lids have an outer diameter of 60 mm(2.36 inches) and a height of 20 mm/0.79 inches; lids are slightly larger in diameter than dishes with air circulation High Quality: With good chemical and heat resistance, can be reused many times Wide range of applications: You can use these in the lab, general training, helping kids with science experiments or themed birthday parties Product Features: These laboratory culture plates are optically clear when examining experiments under the microscope; they have a flat, smooth that allows cells to grow evenly without clumping, and vents on the lid provide protection color:Transparent Material:Glass Package Contents: 10 x glass sterile Only the above package content, other products are not included. Note: Light 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.