These are 8 forks with 1 wood mallet. C-256 Hz, D-288 Hz, E-320 Hz, F-341. 3 Hz, G-384 Hz, A-426. 6 Hz, B-480 Hz, and C-512 Hz These are made in good quality Aluminium giving long lasting sound. Good finish and frequency is tuned to accuracy +/-0.25% Can be used by Students, Teachers, Musicians and Healers.