60mm x 15mm Cell Culture Dishes. Vacuum-gas plasma tissue-culture treated polystyrene for uniform surface chemistry, cell attachment, spreading and growth. Flat, optically clear, manufactured from crystal grade polystyrene. Lid designed for optimal gas exchange. Stacking rings. Sterilized by gamma irradiation, nonpyrogenic. Shelf Pack of 20, Case of 500. Falcon® (a Corning Brand) #: 353002.