Corning 4980-500 Pyrex Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim, 100 mL capacity-500 mL Capacity Graduation Range, Rubber Stopper Number 7, 101 mm Diameter;

These 500 ml Pyrex Erlenmeyer flasks are designed with heavy duty rims to reduce chipping. Their uniform wall thickness provides the proper balance between mechanical strength and thermal shock resistance. Approximate graduations are in durable white enamel. An extra large marking space is also provided.