Zildjian K Custom Dark Hi-hats Pair A Fast, Bright Chick That Cuts Through. The K Custom Cymbals Are Specially Designed To Provide More Volume And Cut With A Quicker Attack And Decay Than Traditional K Zildjians. 14" Diameter. Art Blakey, Elvin Jones, Tony Williams, And Scores More Musical Movers Have Sworn By The Deep, Dry, Shimmering K Sound Developed In 19th Century Turkey.