Motor Mounting Base, Compatible Motor Diameter 5 in, Compatible Ring Diameter 2 1/2 in, Compatible NEMA Frame Size 42, Mounting Bolt Hole Spacing Length 1 3/4 in, 2 3/4 in, Mounting Bolt Hole Spacing Width 4 1/4 in, Ring-to-Ring Distance 5 1/2 in, Includes (2) Clamps, Gray Color, Overall Height 3 3/8 in, Overall Length 5 9/16 in, Overall Width 6 in