Campagnolo bearing cups explained. Note these are for the older hubs with steel threaded axles and cup and cone bearings.

HB-CH001 are for all front campagnolo hubs that are not Record - rounded back
HB-RE009 are for all record front hubs - square back
FH-RE005 is for all rear threaded freewheel record hubs and record cassette hubs for the left rear
FH-VL001 is for all non record cassette hubs left rear and non record threaded freewheel.