Replacement Motor Assembly, Compatible Grainger Part Number 4C378, 4C380, 4C379, Compatible Manufacturer Model Number 662, 668, 678-A, 678-B, 678-C, 678-D, 678-E, 678-F, 688-A, 688-B, 688-C, 688-D, 688-E, N678-A, N678-B, N678-C, N678-D, N678-E, N688-A, N688-B, N688-C, Material Steel, Overall Depth 4 1/2 in, Overall Height 3 3/4 in, Overall Width 4 1/2 in