Falcon 100mm Cell Culture Dish, TC-treated Polystyrene, Sterile, Actual Dimensions - 89.43mm O.D. x 19.18mm, Improved product integrity - Redesigned packaging virtually eliminates broken and scratched dishes, Consistent culture conditions - Routine performance testing ensures consistent cell attachment and growth, Easy to visualize your cells - Stacking ring separations allow airflow between dishes; reducing condensation, Fewer messy spills - Interlocking stacking rings dramatically improve stacking stability.