im not sure what ur thinking of are u thinking about the knuckle if so theres 2 types i think,
theres the sold bearing type (that uses a solid bearing) lol
and the split bearing just like the rear drum bearings thats the way i think ov it its usualy the mk3 fiesta knuckle and the mk3.5 fiesta knuckle nothing in it realy its just the different type ov bearing that goes in it