Sabian SR2 is a new concept in cymbals. These cymbals are recycled used/returned/refurbished product that Sabian received back through inventory swaps, trades, exchanges, and has been factory renewed. All of the cymbals are cast B20 product, but there is no differentiation by series at all, so any cymbal could have started as an AA, AAX, HH, HHX, Vault, etc. The Sabian SR2's will only be designated by size and weight. For example the 16" SR2 cymbals will be labeled as 16" SR2 Thin, 16" SR2 Medium, or 16" SR2 Heavy.These cymbals will be available on a first come/first serve basis. Since it is refurbished product, we will only have it available as we receive it. There is no warranty on the SR2 Series since it is considered used. However, these cymbals can be returned and exchanged per our return policy.