Discover the exceptional quality of Fisherbrand™ Petri Dishes with Clear Lids at Scientific Supplies & Technology Inc. These dishes are made from medical-grade, gamma sterilized polystyrene for optimal performance and safety. With ventilation ribs on the lid for superior air circulation, your cultures will thrive. Each product sleeve is vacuum sealed to prevent scuffing, made from a strong polymer to avoid bag holes, and packed in an easy-open format, ensuring your dishes are in perfect condition every time. Measuring approx. 92mm O.D. and 88mm I.D., they are the ideal choice for your lab needs.