The M design with drive motor (vacuum-proof, pressure-resistant up to 200 bar) Magnetic stirrer drives offer all the advantages of the G design couplings and are additionally equipped with a three-phase motor. This combination can be used for applications up to 200 bar (in the variant made of high-temperature-resistant alloy A-286, 1.4980 even up to 700 bar). It can be controlled either by means of a frequency inverter or via a hand wheel on the ball roller gearbox. Variants in special materials such as Hastelloy C22, C276, B3 are available on request.