Magnetically-coupled Spectro-Stir, permanent magnet attached to the motor shaft to turn a PTFE coated spin bar or spin fin placed within the cuvette. The model MTR-114 motor uses a magnet slightly smaller than the diameter of the motor. It may be mounted with a mounting clip supplied with each magnetic motor kit or system. It may be mounted below, or alongside the cell, on a simple bracket or fixture supplied by the user. Only 35mm clearance, between the cell and cell compartment, is required.