strings flatwound bass long scale

Hey, I've been looking for a set of light gauge flats for my 4001. I've narrowed it down to the La Bella low tension flats or the Thomastik jazz flats. Anyone tried the LA bellas on a 4001? And are they safe for the neck? Thanks

Hello all! I am trying to identify these long scale flatwounds that a friend gave me and he doesn't for the life of him remember which brand/scale they are. I tried measuring with a calliper and it seems possible that they are 43 62 80 104, which would point to La Bella. Here is photos of both...