Motor Grounding Ring Compatible Motor Frame 225M 225S (4 6 or 8-Pole) 250M (2 Pole) For Motor Frame Type IEC For Nominal Shaft Diameter 60 mm Material Aluminum Ring Construction One Piece Ring Outside Diameter 94 57/64 mm System of Measurement Metric Features Designed to Help Extend Motor Life by Safely Diverting Harmful VFD