Our tuning fork nerves are made of aluminum alloy. The sound quality is crisp, the sound is simple, and the vibration frequency is high. The surface is high-gloss, oxidized, durable. Applicable: Yoga can not only relax the mind, but also quickly enter a meditative state. Guitar tuning forks can also be used to identify types of deafness. Depending on the synchronicity, the instrument, the platform, and the tuning fork are a handy tuning tool. Mainly used in homes, spas, yoga studios, massage rooms. Set includes: We have 5 stainless steel tuning forks (128HZ 256HZ 512HZ 1024HZ 2048HZ) and a silicone hammer to meet your different needs. Attached storage bag for easy storage and portability. Tuning forks are used to measure a patient's hearing and vibration sensitivity to damage and are also used in physics experiments and teaching. MULTI-FUNCTIONAL TOOL: Not only is this aluminum fork a convenient sound tool for string musicians, it can help you relax, reduce anxiety, refresh yourself and enter a deep meditative state faster. Various Applications: Aluminum points are suitable for many people, including musicians, teachers or music lovers. metal frequency can improve people's ability to recognize sounds and improve hearing. Also suitable for children with increased sensitivity to noise. Colour:Silver Material:Aluminum alloy Package Contents: 5 x Tuning Fork 1 x Hammer 1 x Storage Bag 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.