Zildjian 18" S Medium Thin Crash Cymbal Superb-sounding cymbal line for the Semi-Professional/Professional musician B12 Alloy (88% Copper, 12% Tin) produces balanced low-mid-high frequencies Top-bottom lathing crafted perfectly in weight, feel, sound Extensive hammering for dialed-in sonic response through all dynamic ranges Brilliant Finish - bright shimmery tone that opens up sound