Tandem axle?.....5 lug?....if so should be L68149/L68110 inner brg/race....L44649/L44610 outer brg/race...seal should be 2.33 x 1.38 double lip spring seal...if it's a single axle, it maybe a 4200 lb axle, with a straight spindle, that would be L68149/L68110 inner & outer brgs, seal would be the same as above...