All SABIAN sets are “Sonically Matched” by Product Specialists in the SABIAN Vault. Rather than just take each cymbal off the shelf and put in a box, they are first tested individually and then for overall compatibility with the other cymbals in the set.  This ensures you get a ready to go set up, straight out of the box. The HHX Evolution Promotional Set consists of 14″ Evolution Hats, 16″ Evolution Crash, 20″ Evolution Ride and a FREE 18″ Evolution O-Zone.