Guide Wheel Bearing Protection Sealed Shielded For Use With Track Lubrication Klubersynth UH1 14-151 Maximum Load Axial 900 lbf Maximum Load Radial 2 181 lbf Maximum Operating Temperature 212 Degrees F Minimum Operating Temperature -22 Degrees F Series DualVee Size 4 System of Measurement Inch Vee Angle 90 Degrees Wheel Material Carbon Steel