La Bella's Drop Tune Series for Electric Bass is specifically designed for standard and various drop key tunings. The stainless steel round wound strings have larger cores that are uniquely constructed to maintain the correct tensions while tuning down.- Stainless Steel Round Wound- String Gauges: .054, .075, .090, .111- Made in the USA with American Wire- Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness