Designed in collaboration with media pourer automation manufacturers and manual end users Made of optically clear virgin polystyrene Sterilized by irradiation SAL 10 -3 Four vents supplied to provide consistent gas exchange and enhance stacked dishes stability Packed in easy to open sleeve of 25 dishes BP94A-01 Automation Petri Dishes Design: Slippable BP94S-01 Manual Petri Dishes Design: Stackable