For the sake of improving sound effect and promote performance effect that you can use this guitar arm bar, which also can be freely to adjusted, its solid and hard texture make it be non-deformed.Absolutely that you can take it to anywhere to use with its compact size, and the lightweight texture is portable with long lifespan due to the solid texture and be portable to store in bags.By making with metal material, this guitar bar will be solid and wear-resistant to use.The length of the product is 19.4cm, the diameter is 0.48cm and 0.58cm.It is suitable for electric guitar to use for adjusting tremolo tone.Item Name: Guitar Arm BarMaterial: MetalFeatures: High Stability, Enhance Sound, AdjustableColors: Black, WhiteSize Details: Length: 19.4cm7.64" (Approx.)Diameter: 0.48cm0.19" (Approx.)Diameter: 0.58cm0.23" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Guitar Arm Bar