Zildjian K Series Cymbals – Bronze: Jazz, studio, and orchestral drummers love Zildjian K Series Cymbals because of their well-known dark, warm, and complex tones. Traditionally, Zildjian’s exclusive B20 bronze alloy—which is composed of 80% copper and 20% tin, frequently with traces of silver—is used to cast these premium cymbals. Their extensive hand-hammering and lathing processes give them a rich, musical character and controlled sustain, making them versatile for a variety of musical genres.