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Hyatt, under license with General Motors, produces five basic sizes from 75mm to 150mm bore. These quiet and long-lasting traction motor armature bearings are produced to the same designs and specifications of GM's New Departure Hyatt Division, jointly developed with OEM locomotive builders. QS-9000/ISO-9001 certified — conforms to AAR-M1003 per NAPM-RIG QSSS