13 Piece Standard Tuning Fork Set With Mallet & Storage Pouch - A=426.6- Full Octave Frequencies are: 256 Hz - Low C- 7 1/2" long, handle 2- 271 Hz - C#- 7 1/4" long, handle 2"- 288Hz-D- 7 1/4" long, handle 2"- 304Hz-D#- 7" long, handle 2"- 320Hz-E- 6 3/4" long, handle 2"- 341.3Hz - F- 6 1/2" long, handle-2" 362Hz - F#- 6 3/4" long, handle 2"- 384Hz - G- 6 1/2" long , handle 1 3/4" - 406Hz - G#- 6" long, handle 2"- 426.6 - A- 6 1/4" long, handle 2"- 456Hz - A#- 6 1/4" long, handle 2"- 480Hz - B- 6" long, handle 1/3/4"- 512Hz - High C- 5 3/4" long, handle 1 3/4"- Not Meant to Tune Musical Instuments that are tuned to A=440 Great for Physical Science Experiments Comes With Striking Mallet & Velveteen Storage Pouch Tune your Body- Promotes Healing