Petri Dishes, Standard, 100 X 15 mm
500 per case. These Petri Dishes are designed for easy, one-handed opening and closing. The flare and length of lid skirts allow lids to be removed and replaced easily, while the extreme flatness of dishes provides obstruction-free viewing. Injection molded from virgin biomedical grade polystyrene crystal, every lot of dishes is tested by an independent laboratory to verify the 100% effectiveness of the environmentally friendly E.T.O. sterilization method. Extra heavy polyethylene sleeves, 175 lb test cardboard cartons, and egg crate style dividers assure that Ultra-Dishes arrive intact.