Fender 7250 Nickel-Plated Steel Roundwound Bass Strings Fender super bass 7250s are an excellent all-purposebass string. They are particularly good for rock, funk, andany style in which the bass needs to cut through. Fender super bass 7250s combine the high output anddynamic sound of steel with the smooth feel of nickel. The result is a string with bright highs and a thunderouslow end. Super bass 7250s are installed at the factory onallFender us and mexico basses.