4 Bolt Flange Bearing, Back Side to Center Width 0.591 in, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 1 11/16 in, Bore Type Cylindrical, Closure Double Sealed, Expansion Type Fixed, Housing Material Cast Iron, Housing Type Square, Included Bearing GYA111RRB, Lubricant Material NLGI #2 Equivalent, Maximum Speed 3, 280 RPM, Maximum Temperature 200 Degrees F, Minimum Temperature -65 Degrees F, Mount Hole Center-to-Center Height 4 1/8 in