SureGrip Center Well DishPetri Dish Center Well Dish Special design with an extended ring on the edge of the lid for easy opening. Unique design of a tapered base for easy lifting. An extra ring on the base for better gripping and to reduce the risk of accidents. Markers for 3,6,9 & 12 on the dish to prevent disorientation. Marked with numbers on the inner well. The lid is designed with posts for better CO2 exchange. Engineered with a double layer, sloped inner wall to avoid