La Bella VSB4D Vapor Shield Bass Strings, 45-105 Nickel-Plated Round Wound treated with Ionic Vapor Process Slick mutated surface is resistant to oil and grime String Gauges: . 045, . 065, . 085, . 105 Made in the USA with American Wire Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness