Product review (4 stars): Exactly what I wanted.  No more.  No less.
This was exactly the part I needed for my Electrolux/Frigidare FDB1050REL0 model dishwasher.  The model didn't cross reference from the sales page, but it fits perfectly.  Dimensions are exactly the same as the old part.  The white piece in the photo's is NOT a replacement shaft (at least it wasn't for me).  If you can get your old one pump assembly apart without trashing the motor or shaft, it's a MUCH cheaper option than buying the WHOLE PUMP ASSY (for about $150).
Dimensions of the stationary seal are:
.866" OD
.400 ID
.3175 high

Dimensions of the moving part are:
.840 OD
.335 ID
.500 High