This is a 2013 Zipp 900 tubular rear disc wheel.  I got it brand new and have done 1 Ironman and 1 Olympic tri on it.  Serious inquiry only.  Email/call if you are interested.   I can sell it with tires or without.  With cassettes or without.  Shimano/SRAM 10 speed freehub.  Comes with additional valve stem covers and pump adapter.
 
Thanks,
Huan
 
(352)246-7756