The Angel tuning fork set brings clear tone, with longer sound and accurate tuning. Extended long handle of turned smooth aluminum to facilitating bone conduction tests and more persistent ringing frequency. The Tuning Forks are made of high quality aluminum alloy material, , sturdy and and stainless, non-magnetic. The tuning fork produce clear tones, longer vibration sound and accurate tuning. The Tuning Fork is suitable for release stress, achieve deep relaxation, calm mind, promote positive energy, which is demand by wellness professionals, , musicians teachers, science lovers, sound therapists etc. 4096C is great for crystal cleaning purpose. Ergonomic long handle, increase the control of hitting force, beautiful and comfortable perfect combination. Material: Aluminum alloy colour: C-Silver Package Contents: 3 x Tuning Fork 1 x hammer(Random color style, don't accept the specified color style) 1 x storage bag 1 x cleaning cloth 1 x Crystal Stone(Random color style, don't accept the specified color style) 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.