Convenient assortments of tuning forks. Made of aluminum alloy. The frequency and scale letter is stamped on each fork. Set of 8 includes a storage box. Additional Info: Tuning fork set of 8, 256 hz to 512 hz Package Size(L x W x H): 8.5 X 3 X 1.5 (IN) Categories: Tuning Forks, Aluminum HTS Code: 9209.91.8000 UNSPSC: 6.01048e+007 Country Of Origin: INDIA