This square cell culture/petri dish with a lid is designed for optimal performance. It has a Nunclon™ Delta surface treatment which is a proprietary surface modification that promotes maximum adhesion for a broad range of cell types. Made from high quality and optically clear polystyrene (PS). Top and bottom stacking rings allow for easier handling and more stable stacking. Comes with air vents for gas exchange. Includes a certificate which assures user of biological performance as well as traceability. Sterilized by gamma irradiation. Dimensions (L x W x H): 245 x 245 x 25mm. Shape: Square. Culture Area: 500cm². Working Volume: 135mL. Material: Polystyrene. Nunc #: 166508.