Mark Bass MB5LESS40120LS Longevo Stainless Steel Nano-film Shielded Bass Strings Long Lived (.040 - .120)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: Masters 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