Specification:
Features:
Use the bottom radius of the meter to accurately measure the fingerboard radius of the instrument. 
Then use the matching top radius of the meter to determine the appropriate height adjustment for the saddle.
Radius instrument has 9 sizes: 7.25\'\' 9.5\'\' 10\'\' 12\'\' 14\'\' 15\'\'  16\'\' 17\'\'  20\'\'.
These are the most popular fingerboard radii, making it easy to measure the radius or below the strings.
Use these to accurately set the guitar bridge saddle to match the fingerboard radius.
Specification:
Size:7.25\'\' 9.5\'\' 10\'\' 12\'\' 14\'\' 15\'\'  16\'\' 17\'\'  20\'\'
Package List:
9*Radius Gauge