A=440 Hz, 4 3/4 inches long x 5/8 inches wide. Perfect for home or travel, for musicians or teachers, or even science lovers. A fine quality Nickel plated tuning fork. * Works great for Violin, Mandolin, Guitar. Tap it on the table set it on the instrument top and tune your "A"string to 440 hz. * A necessity for every player Small and accurate for pefect tuning every time * Frequency: A-440 material: metal Color: silver Package Includes:1x Tuning Fork 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. A=440 Hz, 4 3/4 inches long x 5/8 inches wide. Perfect for home or travel, for musicians or teachers, or even science lovers. A=440 Hz, 4 3/4 inches long x 5/8 inches wide. Perfect for home or travel, for musicians or teachers, or even science lovers.