This complete system comes with the vessel, impeller assembly and top drive motor. The large adjustable height PTFE paddle (part of the impeller assembly) works together with the dimple in the bottom of the flask to provide gentle, even distribution and reduce dead areas. The impeller's wetted components include 316L stainless steel, virgin PTFE and Rulon 641. Rulon 641 is a specially formulated compound of virgin PTFE and fillers approved by the FDA. The vessel is equipped with six or seven 45 mm sidearms to accommodate probes for monitoring and control, and tubing for sparging or media addition. All vessel and impeller sections are autoclavable, the lift-off top drive is not autoclavable. Each unit is supplied with one of seven standard electrical plugs and comes with a one year warranty. Electrical Requirements: 100 - 120 VAC, 60Hz, 30 watts; 220 - 240 VAC, 50/60Hz, 30 watts. Dimensions: (10/19 L) 29 cm Dia x 67 cm Ht; (45) 41 cm Dia x 78 cm Ht