[COMPATIBLE]: 440 Hz tuning forks suitable for Tune your violin, piano, guitar, ukulele, autoharp, sound therapy, energy work, balance, meditation, stress relief, relaxation, perfect for health , therapists, vibration and sound therapists, workshops.[EASY TO STORE]: The 440Hz tuning fork easily fits in any instrument case or pocket because of its small size, and to avoid this 440Hz tuning fork being other sharp objects. Please don't leave it in a damp place for too long or keep the wooden dry and from sunshine before and after use.[DESIGN UNIQUE]: suitable for all kinds of frequencies. made of high-quality alloy with fine workmanship and high precision. tuning fork produce clear tones, longer vibration sound and accurate tuning.The circular design of the tail perfectly combines aesthetics and comfort, and the ergonomic handle is convenient to hold.Color: silverMaterial: aluminum alloyPackage Contents:1 x Hammer (colors and styles are random, Not accepting designation)1 x tuning forks1 x cleaning clothOnly 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.