Square polystyrene Petri dish is sterile and free from optical distortion. Ideal for phage typing, susceptibility testing, plate counts, and probe assays. Each 13mm grid is marked numerically in one direction and alphabetically in the other. This dish has four venting ribs into the underside of the lid to prevent condensation build-up.
Commonly referred to as a 100 x 15mm dish; actual dimensions are 90 x 15mm.