This 60 x 15mm stackable Petri dish is molded from medical grade virgin polystyrene, with optically-clear top and bottom viewing surfaces. It features a smaller 'media saver' diameter that uses less media, while the constant flatness allows for even media distribution. Ventilation ribs allow for free air circulation and reduce condensation during incubation. It has a flared lid skirt and squared corners for easy one hand operation, especially with gloves. This disposable, single-use Petri dish is radiation sterilized and the contents are sterile if the packaging sleeve is unopened. It is traceable by lot and sku number, and Certificate of Sterilization Processing and Certificate of Compliance are available upon request. It is ideal for general microbiological use, as well as water treatment and pharmaceutical membrane filter tests. Media not included. Packed in sleeves of 20 dishes. Disposable. Sterile. Material: Polystyrene. Color: Optically Clear. Rim Feature: Stackable. Dish Feature: Media Saver. Style: Mono. ISO Mark Target: No. Nominal Size: 60 x 15mm. Kord-Valmarkª #: 2901.