This is a Zildjian cymbal pack in the K Custom line, model KCSP4681. Zildjian mixes and rolls its own bronze rather than buying finished blanks, and the lathing and hammering that set the pitch and decay are done on its own machines.
One box that covers hi-hats, crash and ride, so a kit is playable without buying cymbals one at a time.
Avedis Zildjian Company has been casting cymbals since 1623 and has made them in Massachusetts since 1929, where its B20 bronze alloy is still mixed and rolled in house.
