The Z3 line of cymbals are cast from an 80% Copper/20% tin cast-bronze alloy, and are are designed for rock drummers: loud and aggressive. Oversized bells, large sizes, and symmetrical hammering all help provide the tone that rock drummers listen for.
The 21" Ultra Hammered China features an inverted 'volcano' bell and an extensively hammered lip, making it trashier than other chinas of the same diameter.