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Standard Petri dishes have bubble-free construction to evenly spread cell growth. High-quality plates have a translucent longevity for high-resolution microscopic studies Disposable or reusable petri dish surfaces come non-treated or treated for cell attachment. Multi-well designs allow simple side-by-side comparisons. Graduated models easily locate specimen even in large culture media colonies. Tight fitting lids protect sample from contamination and may be vented. Aseptic, sterile, and non-sterile Petri dishes come in any growth area size needed. Glass petri dishes are best suited for pharmaceuticals and hospital environments.