The territorial restrictions for REXEED-S is strict but not for REXEED-A.
In the meantime, since you are an existing REXEED-15S user, we would
like you to get REXEED-15S from our distributor before you get REX-A.
Though, REX-S and REX-A are different dialyzers, I believe you will find
it is very easy to shift from S to A and you will like REX-A.