Standard Tuning Fork Boxed Set of 8 A=426.6 with Separate Mallet Frequencies include(in Hertz): 256- 7 1/4 long, handle is 1 3/4 288- 7 long, handle is 1 34/" 320- 6 3/4" long,handle 1 3/4" 341.3- 6 1/2" long, handle is 1 3/4" 384- 6 1/3" long, handle is 1 3/4" 426.6- 6" long, handle is 1 3/4" 480- 5 3/4" long, handle is 1 3/4" 512- 5 1/2" long, handle is 1 3/4" Comes in a fitted wooden case. Great for Science Demonstrations. Tuning Forks are Valued for their Healing Properties