I think the big advantage of buying the German wheel cylinders is that the
rubber is better and that is what usually fails on wheel cylinders.  So you
have the idea of Brazilian rubber lasting maybe 5 years and German rubber
lasting another 10 or 15.
I am saddened that you aren't buying these from me :(
I even have a picture of them on my website and everything (see url below and
go to "parts search" page.)

Thanks,
Ken Wilford
http://www.vanagain.com
John 3:16
Office (856)-765-1583
Shop (856)-327-0027
Fax   (856)-327-2242