Corning 4980-300 Pyrex Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim, 100 mL capacity-300 mL Capacity Graduation Range, Rubber Stopper Number 6, 89 mm Diameter: Amazon.com: Industrial & Scientific
5020-250 | PYREX® 250 mL Narrow Mouth Erlenmeyer Flask with PYREX® Standard Taper Stopper | Corning
Pyrex 250mL Erlenmeyer Flask – MSU Surplus Store
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