Description This piano string gauge is a professional piano regulation tool designed with a metal mini measuring ruler for precise string spacing and diameter measurement. Ideal for piano technicians and luthiers, it enables quick identification of string size and tension, streamlining piano tuning and repair in studios, homes, and music shops. Features -Color:Silver -Material:Metal -Size:13.00X3.00X0.20cm/5.11X1.18X0.08in -Accurate measurement: effortlessly assess piano string diameter and tension with this piano string gauge, ensuring optimal string selection for all piano types, including upright and grand pianos -Versatile application: suitable as a piano regulation tool for technicians and luthiers, this piano measurement tool aids in precise tuning, repairs, and maintenance scenarios -Efficient string replacement: with the piano string replacement tool feature, quickly identify string sizes and spacing, streamlining the changing process for efficient service and home use -Portable & durable design: metal mini measuring ruler construction delivers lasting accuracy, making it an essential upright piano gauge for concerts, rehearsals, classrooms, and practice -Easytoread interface: the string gauge offers a clear piano string inspection tool with intuitive markings, so even beginners can confidently measure and judge string action with easePackage list: 1 x string measurer