Brand new, 285 HZ Tuning Fork, highest quality. Unweighted, alumunim. great tone. 285 Hz is the second tone of Healing Solfeggio Set of 9. Each tuning fork is calibrated, tested, and wrapped in plastic at the lab. Produced in USA from patented aluminum. 285 Hz is a musical tuning fork with many uses in sound therapy, relaxation, wellness. Does not diagnose or cure