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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: Amazon.com: Industrial & Scientific
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Corning 4980-125 Pyrex Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim, 50 mL capacity-125 mL Capacity Graduation Range, Rubber Stopper Number 5, 67 mm Diameter: Amazon.com: Industrial & Scientific
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