Features:Disclaimer:All product names, brands, logos and other trademarks in our commercial communications are the property of their respective owners. They are used to simplify the identification of the relevant parts of electrical equipment. None of the companies or trademarks affiliate, support, or sponsor us or our products. Material: Aluminum AlloyColor: SilverType: Tuning fork produces clear sounds, longer vibration sound and accurate tuning. The vibration frequency of the tuning fork is 136.1Hz, which has a long-lasting sound effect and strong vibration strength. Suitable for musicians or teachers, or science lovers, etc. Package Included:1*136.1Hz Tuning Fork1*Silicone Hammer1*Soft Storage BagNotes:1. To make the tuning fork more accurate, do not touch it with metal.2. Please keep the wooden striker dry and away from the sun before and after use.3. Please allow 1cm error due to manual measurement. Pls make sure you do not mind before purchasing.