This seal fits the TP Trailer Spindle design (shape & size) at the end of the axle. ConMet PreSet Plus Wheel Hub Applications with the TP application would need this type of seal. Conjointly the Axle shape and size would also determine size of bearings needed which in this case is: PreSet Bearings; Inner and Outer Set No. SET432; ConMet No. 10041945. Conventional Bearings: Inner and Outer: SET415 or Inner & Outer ConMet No. 10041945