Dishes are optically clear, making them suitable for microscopy.60mm, 70mm, and 100mm dishes have a gripping ring incorporated in the design,Every inner bag is printed with a batch number for traceability.. Clear PS, sterile, and certified non-pyrogenic. Flat bottom and uniform wall thickness ensure dishes are distortion-free. Stacking rings for easier stacking and handling. . . VWR 10062-880 Cell Culture Dish with Gripping Ring, 100mm Dia, 22mm Height, Pack of 300. Country of Origin : United States. Part Number : 1176J23CS. Pack of : 300.