The Premotec Iron Core DC motors have a modular structure that allows the motor to be integrated with two gearbox types in ratios from 6 to 729:1. The use of plastic in these motors minimises cost whilst giving high resistance to chemicals and corrosion. Reliability is maximised by using internal spark suppression. Metal-geared versions are available for higher torque versions. Output power ranges from 3W to 12W. The speeds range from 2700 to 4200 rpm without gearbox.