The Magna Flex™ Spinner Flasks feature a flex-type, bulb-shaped glass impeller that rotates from a fixed position above liquid level around an indentation in the base of the flask. Primarily designed for use with microcarrier cultures, this unique stirring system increases stirring efficiency and provides a gentle, even circulation throughout the flask while keeping the beads in suspension.
Wheaton® Magna Flex™ flasks are available in sizes ranging from 125 to 6000mL and are fully autoclavable. The flasks are borosilicate glass with two large sidearms with screw cap closures for easy sampling. Units 500mL and larger have 45mm sidearms to be used as an air vent, media inlet or outlet, inoculation port or pH probe inlet. All flasks have been proportioned to provide a head space ratio of 1:1 or greater. A removable stainless steel pin immobilizes the impeller during handling or decanting to prevent damage to cells or microcarriers. Sizes 125 to 1000mL are graduated in 50mL increments; sizes 3000 to 8000mL are graduated in 500mL increments. Sizes 500mL and larger can be used with the Vented Cap (Cat.No. 12-W240751). Additionally, the 125 and 250mL sizes have a 51-400 thread finish; all other sizes have a 100-400 thread finish.