Agitation: 25 to 400 RPM with 1" (2.54 cm) orbit and to 300 RPM with 2" (5.1 cm) orbit; +/-1 RPM Space-Saving Door glides up and out of your way Slide-Out Platform provides easy access to all samples Double-Pane, Thermal Glass provides excellent insulation and clear observation of cultures Extra-Large Chamber holds flasks up to 5 liters