This square polystyrene (PS) Lab-Tek® petri dish is suitable for culturing of fungi, bacteria and other microorganisms. It performs well in automatic dispensers due to its complete flatness and uniform height. The contact dish is useful for sampling in hospital environments as well as in food science and the pharmaceutical industry. Compatible with automated systems. Without stack ring. Vented. Shape: Square. Material: Polystyrene (PS). External Dimensions Including Lid: 100 x 15mm. Internal Dimensions: 89mm. Culture Area: 79cm². Nunc #: 4021.