4 Bolt Flange Bearing, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 2 1/8 in, Bore Type Cylindrical, Closure Double Sealed, Housing Material Cast Iron, Housing Type Square, Included Bearing UC211-34, Lubricant Material NLGI #2 Equivalent, Maximum Temperature 250 Degrees F, Minimum Temperature -40 Degrees F, Mount Hole Center-to-Center Height 5.125 in, Number of Mount Holes 4, Overall Height 6.375 in, Overall Length 6.375 in, Overall Width 2 5/16 in