Thermo Fisher Scientific Nalgene Floating Stir Bar. Floating stir bar designed for low-speed stirring in tissue-culture applications. The stir bar is slightly raised off the bottom surface of the vessel to minimize grinding effect on cells. Constant action at lowspeeds. Legs can be compressed to fit through small openings. Autoclavable. Material TFE. Height 31mm. Diameter 155mm. Pack Qty 2.