Cartridge Bearing Unit Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 1/2 in Closure Double Sealed Housing Material Rubber Lubricant Material NLGI #2 Equivalent Maximum Temperature 220 Degrees F Minimum Temperature -20 Degrees F Outside Diameter 2 17/32 in Overall Width 1.14 in Rolling Element Rows 1 Seal Type Contact Shaft Locking Type Set Screws System of Measurement Inch Application HVAC Bearing Material Grade 52100