Sabian SR2 cymbals are 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. There is a 90 day warranty on the SR2 Series.