4 Bolt Flange Bearing, Back Side to Center Width 19.1 mm, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 20 mm, Bore Type Cylindrical, Closure Double Sealed, Housing Material Cast Iron, Housing Type Square, Included Bearing A-UC204D1M, Lubricant Material NLGI #3 Equivalent, Maximum Speed 6,660 RPM, Maximum Temperature 120 Degrees C, Minimum Temperature -40 Degrees C, Mount Hole Center-to-Center Height 63.5 mm, Number of Mount Holes 4, Overall Height 85.7 mm