Space Saving Stackable Incubator Shaker. Temperature Range from +5ºC above ambient to 80ºC. New Brunswick Scientific's Innova 44 Series Lab Shakers provide large-capacity shaking for laboratories short on space. These shakers accept test tubes and flasks up to 5 liters; and can be stacked up to three units high as shown, for triple the capacity, while occupying the same space as a single shaker. Innova 44 offers incubation up to 80ºC, while Innova Model 44R adds refrigeration.