Wheaton Spinner Flask 4000 ml Double Sidearm Borosilicate Single Threaded Arm

The Wheaton (DWK Life Sciences) WC000039 Spinner Flask is a high-capacity culture vessel specifically engineered for suspension cell culture and microcarrier applications. With a total volume of 4000 mL (4 Liters), this flask serves as an ideal intermediate scale-up unit between standard benchtop flasks and larger production vessels. It is constructed from premium low-extractable Borosilicate Glass (conforming to USP Type I and ASTM E 438 Type I, Class A standards), ensuring excellent chemical resistance and the durability required to withstand repeated autoclave sterilization cycles without compromising the vessel's integrity.

Design-wise, the flask features a Single Threaded Center Neck that accommodates the top cap assembly and stirring mechanism, along with Double Sidearms. These sidearms are a critical feature for process control, providing dedicated ports for inserting monitoring probes (such as pH or Dissolved Oxygen sensors), adding media, or introducing gas lines without needing to breach the main center seal. The system is designed to operate with a magnetic stir plate, utilizing an internal impeller (typically the gentle, bulb-shaped Magna-Flex or bladed Celstir style) driven from below. This configuration ensures uniform, low-shear mixing that keeps cells in suspension while minimizing physical damage to sensitive cell membranes.