Stand alone stirrer will fit the Applikon style vessels from 1 to 7 liter.The motor has incredible power for its size, 91 in-oz.Control box is extremely small, measuring only 3.5” Wide x 4.5” high x 2.5” deep.It has a clamp that allows the control box to be attached to reactor support legs up to 14mm in diameter.Unit also has a RS-232 port for PC control and data logging.Note: Only highlighted portion of image is included.Like-for-like replacement parts for Applikon Biotechnology and Broadley-James brands of bioreactors.Applikon is a registered trademark of Applikon Biotechnology, Inc.Broadley-James and Broadley-James Corporation are registered trademarks of Broadley-James Corporation.