These treated petri dishes have a hydrophilic surface to promote cell attachment and growth. Lids contain molded spacers to allow gas exchange and stacking rings for increased stability. A pronounced grip ring offers improved handling. All dishes are supplied sterile (gamma irradiated) and come packaged 10 dishes/re-sealable bag. Optically clear for improved imaging and observation Consistent flatness allows for even media distribution Manufactured from virgin polystyrene All dishes are supplied sterile (gamma irradiated) 15 to 16 mL working volume 60.5 cm² growth area