Zildjian A20555 A Custom Mastersound HiHat Bottom - 15"A Custom Mastersound HiHats feature the same crisp, rich and colorful sounds associated with the A Custom range, but with a bolder and full bodied overall sound. Hammered grooves in the bottom cymbal rapidly vent trapped air for a fast and clear "chick" sound. Features Full bodied HiHat sound that is bolder for A Custom Features same crisp, rich and colorful sounds associated with A Custom range Hammered grooves in bottom cymbal rapidly vent air Fast