Head heat 16x19 or 18x19??

Sander

New User
The head flexpoint heat has been advertised with both stringpatterns. On TW it used to be 16x19 now they changed it to 18x19. On the official head site it is 16x19 but they show a picture of an 18x19 racket. So are there really two types of stringpatterns/ rackets (old/ new, US/ Europe) or is it just the 18x19?
 
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