Corning Pyrex Vista™ 250 ml Narrow Mouth Erlenmeyer Flasks With Heavy Duty Rim

(This is the suggested replacement for 4990-250)

These 250 mL PYREX VISTA™ Erlenmeyer flasks have uniform wall thickness which provide balance between mechanical strength and thermal shock resistance. Approximate graduations are in durable blue enamel. An extra large marking space is also provided. The 250 mL Erlenmeyer flask is designed to ASTM E-1404 Type 1.