The tuning fork is constructed from clinical-grade aluminum alloy and treated to resist corrosion. Our crystal gemstone feet are also made from the same quality aluminum material. Frequency Therapy Device: Use our tuning fork kit to enhance relaxation and relieve stress through the power of music. Dig into healing frequencies and sounds with this kit, which includes an unweighted 528HZ tuning fork and a weighted 136.1 tuning fork The Power of Sound: Studies show that weighted tuning forks can relieve muscle tension, reduce joint discomfort, and soothe the nervous system. The 528 Hz tuning fork uses what many call the sound frequency of unconditional love and miracles to repair . Tuning Fork Holder Style: A-pink gemstone Material: Aluminum alloy colour: silver Package Contents: 1 x 528Hz Tuning Fork 1 x 136.1 Tuning Fork 1 x Tuning Fork Holder 1 x Cleansing Cloth 1 x Velveteen Carry Bag 1 x hammer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.