4 Bolt Flange Bearing, Back Side to Center Width 1.61 in, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 2 15/16 in, Bore Type Cylindrical, Closure Double Sealed, Housing Material Cast Iron, Housing Type Square, Included Bearing A-UCX15-215D1, Lubricant Material NLGI #3 Equivalent, Maximum Speed 1,900 RPM, Maximum Temperature 250 Degrees F, Minimum Temperature -40 Degrees F, Mount Hole Center-to-Center Height 6 in, Number of Mount Holes 4