stainless steel | NANO-FILM SHIELDED STRINGS | long lived - 045 065 085 105 130 Markbass Strings are made at our factory in Abruzzo (Italy), using the best selected innovative materials, new technologies and ultimate quality controls matched with the ancient tradition of master string makers. The LONGEVO series is the result of this match: Master’s artistry and know how linked with Markbass’ attitude to innovate. While respecting the environment as a green brand and the use of applied nanotechnology totally ecological and biocompatible, we offer superior strings shielded with an imperceptible microfilm that gives them exceptional longlife retaining same amazing tone and feeling with unchanged elastic properties, intonation and reliability!