[Aluminum Alloy] Lightweight and high strength, easy to carry, maintains stable temperature, long service life, non-magnetic, pure and stable sound quality, accurate frequency response suitable for various applications [Multi-purpose Tuning Fork for Healing] Can be used for musical instrument tuning, music education, medical practice, and sound therapy. Promotes deep relaxation, enhances concentration and cognitive function, relieves stress, regulates emotions, and supports yoga and meditation practices [Extra Long Handle and Two Sound Activators] The extended handle allows for easy handling and reduces user fatigue. The activators enhance the amplitude and duration of the tuning fork's vibrations, delivering a more consistent and prolonged sound output [Gift] Featuring a unique design and exceptional sound quality, this tuning fork set is a valuable tool for musicians, medical practitioners, and yoga and meditation enthusiasts seeking relaxation and spiritual well-being Color: Silver & Black Material: Aluminum Alloy Package Contents: 4 x Tuning Fork (128Hz, 136.1Hz, 256Hz, 384Hz) 1 x Tuning Fork Activator 1 x Wrench 1 x Cleaning Cloth 1 x Hammer (Colors and styles are random; no specific selection available) Package includes only the items listed above; other products are not included Note: Lighting effects and monitor settings may cause slight variations in color between the image and the actual product. Measurement tolerance: +/- 1-3 cm