... Dishes: 60mm x 15mm. Polystyrene, Sterile. Triple-Vented Lid. Stackable Design Petri Dishes: Our high quality, sterile Petri Dishes have ... feature a triple-vented lid to prevent condensation, and are stackable for your laboratory’s convenience. For Microbiology Research. 60mm ... x 15mm, Polystyrene, Sterile, Triple-Vented Lid, Stackable Design. 500/case ISO and CE Certified Petri Dishes