What you will get: 9 x tuning forks, standard 440 Hz A tuning fork, clearly visible scale on the handle, accurate pitch, good tool for tuning. Length of tuning fork: 12 cm. Scope of application: The tuning fork has an accurate sound, perfect for guitar and violin beginners. When struck, it can produce a long sound, which is convenient for you to make accurate intonation adjustments and maintain your good playing performance. High quality material: The 440 Hz tuning forks are made of metal alloy, sturdy and durable, with strong corrosion resistance, can be used for a long time. The standard tone A tuning fork set is medium in length and easy to carry. Exercise your hearing: Using this tuning fork can also be a good exercise for your ear's acuity for pitch, which will be very helpful for practicing and playing in the future. Colour:silver Material:Metal Size:12 x 1.8cm Package Contents: 9 x tuning fork regulator