Pair Of Trailer Bearing Repair Kits For 3/4 Inch Straight Spindles Kit includes : (4) - 11949 bearings - 3/4 inch Inside Dimension (4) - 11910 races - 1.781 Inch Outside Dimension (2) - Grease Seals - 1.125 Inch I.D - 1.784 Inch O.D Dust Cap - 1.78 Diameter - 1.30 Depth Perfect for those on the road repairs!