2 Bolt Flange Bearing, Back Side to Center Width 0.63 in, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 1 in, Bore Type Cylindrical, Center Height 1 11/32 in, Closure Single Sealed, Expansion Type Fixed, For Environment Highly Dusty and Dirty, Housing Material Cast Iron, Housing Type Rhombus, Included Bearing WJB SB205-16G Insert Bearing, Lubricant Material Chevron SRI 2, NLGI #2 Equivalent, Maximum Speed 6,500 RPM Grease, Maximum Temperature 200 Degrees F