4 Bolt Flange Bearing, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 1/2 in, Bore Type Cylindrical, Closure Double Sealed, Housing Material Cast Iron, Housing Type Square, Included Bearing UC201-8, Lubricant Material NLGI #2 Equivalent, Maximum Temperature 250 Degrees F, Minimum Temperature -40 Degrees F, Mount Hole Center-to-Center Height 2 17/32 in, Number of Mount Holes 4, Overall Height 3.375 in, Overall Length 3.375 in, Overall Width 1 5/16 in