The 760F-MUS set is compatible with Fender vintage THROUGH BODY Mustang bass guitars. The 760F-MUS set DOES NOT work with newer Mustang models that have TOP LOADING BRIDGES. The 760F-MUS set is NOT intended to fit or perform well with other models of bass guitars that happen to have 30" scales where the strings are installed through the body of the bass. Made in the USA with American Wire. Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness.