Zildjian ZHT4 Pro Promo Cymbal Box Set with Bonus 18" Crash Zildjian's newest SheetBronze alloy. 88% copper, 12% tin for increased musicality. All-purpose set-up. Pre-matched box set includes 14" HiHats, 16" Medium Thin Crash, 20" Medium Ride, and a 18" Fast Crash Zildjian's newest SheetBronze alloy. 88% copper, 12% tin for increased musicality. All-purpose set-up. Pre-matched box set includes 14" HiHats, 16" Medium Thin Crash, 20" Medium Ride, and a 18" Fast Crash