ITEM NAME:9pcs/set Understring Guitar Radius Gauge for Electric Classical Guitar Bass Product Description Description: 9pcs/set T Shaped Understring Guitar Radius String Gauge Repair Measurement Tool Luthier Tools for Electric Classical Folk Guitar Bass Instrument Part Accessories Specifications: Material: Stainless steel Color: As shown Model: T-shaped ruler * 9 (7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch, 17 inch, 20 inch) Single T-shaped ruler size: 70 * 65mm/2.76*2.56" Package size: 100 * 60 * 50mm/3.94*2.36*1.97" Product gross weight: 200g Scope of application: Fingerboard radian measurement, string and code radian adjustment for various electric guitars, electric bass, wooden guitars, folk guitars, electric box guitars Notes: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. Included: 9 X Guitar Understring Radius Gauges.Included: 9 X Guitar Understring Radius Gauges. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. If item is defective after 3 months, you can still send it back to us.