From La Bella:

“Since the 1950s, our Deep Talkin Bass^TMstainless steel flat wound strings have been synonymous with that sought after classic vintage tone. Our proprietary ribbon wire adds a subtle brightness, providing unparalleled longevity and response. Handcrafted with precision, our strings feature a smooth finish for effortless playability.

This set is compatible with Fendervintage THROUGH BODY Mustangbass guitars.

This set DOES NOT work with newer Mustangmodels that have TOP LOADING BRIDGES. Top loading models take any La Bella short scale set.

• Stainless Steel Flat Wound; hand-polished for incredibly smooth finish
• Compatible with FenderVintage through body Mustang bass guitars.
• Wound Length of 34 / the distance from the ball-end to where the silk begins is 34. This includes a 1.75 flexible tail by the ball-end.
• Light Tension
• String Gauges: .043, .060, .082, .104
• Made in the USA with American Wire
• Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness

Off-Label Use: This set is not intended to fit or perform well with other models of bass guitars that also have 30 scales where the strings are installed through the body of the bass.

Fenderand Mustangare registered trademarks of FENDER MUSICAL INSTRUMENTS CORPORATION and are not associated with E. & O. MARI, INC./ LA BELLA.”