sound healing instruments are like keys to unlocking doors to rooms within you that you never knew existed You can weave these sound therapy tuning forks into a variety of alternative and holistic practices besides chakra balancing such as acupuncture, sonopuncture, mediation, yoga, breath work, and more tuning forks are made from premium metal that'll deliver accurate sounds session after session; You'll always be to count on them to help you find your center and tune into a state of peace The detailed but easy-to-follow instructional guide makes sound healing accessible to all; This guide is designed to help you unlock more of the transformative power hidden in these ancient tools Material: Aluminum alloy colour: silver+black Package Contents: 4 x tuning forks(The English pattern on the tuning fork is delivered with the factory, don't accept the specified ) 1 x tuning fork activator 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.