Round bottom and long neck 30 mL size has square-cut mouth for multiple micro digestions; mouths of larger sizes are tooled for uniform rubber stopper fit. 30 mL flask conforms with ASTM Standard E 147 for microchemical apparatus; 100 mL through 800 mL flasks can be used in ASTM E 258 procedure.

Non-treated, sterile flasks for suspension cell cultures White caps for easy identification Extra caps in every carton Non-pyrogenic