SCPD-009 9CM Petri Dish 500 pcs/box 49 X 49 X 36 Disposable Petri dish made of transparent polymer materials made of polystyrene ( GPPS ), for laboratory inoculation, scribing, bacterial operation. -Diameter: 9 cm -Growth area: 55cm2 -uniform thickness, bottom without distortion, good transparency, is easy to observe -can meet the training needs of gas exchange -easy grip type flat plate, lateral teeth ring design, minimizing pollution -on the cover and the bottom annular protuberance closely, convenient storage and reduce the mediumvolatile -gamma ray sterilization -Packaged in easy-to-open plastic bags to assure contamination-free. -Quantity: 500 dishes per case