La Bella Black Nylon Tape Wound bass strings have an incredibly smooth outer wrap of black nylon to create a warm, deep, vintage tone with long sustain. Ideal for frettless bass, these strings also work well on acoustic bass guitars, and are the string of choice for many fretted electric bass players, too. Warm, deep, vintage tone; long sustain. Made in the USA with American Wire. Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness.