This economical stir plate features variable 300-1800 rpm speed control with an off position. Epoxy-coated metal housing, 5.5" diameter stirring platform with a load capacity of up to 6 liters. Includes a small teflon-coated stir bar - we recommend getting a 50 mm stir bar (#7063) if you'll be using this stir plate with a 2000 mL or larger flask.