3D dimensional dataset (256^3 cells) in HDF5 format, of a high-resolution MHD cosmological simulations obtained with the ENZO code (Bryan et al. 2015). The data are mapped onto the highest resolution level available (3.95 kpc) and the region is the innermost ~Mpc^3 of a perturbed 1e15Msol cluster at z=0. The fields included are: - gas density [code units], gas temperature [K] and dark matter density [code units]; - x/y/z component of magnetic field, in microGauss. For the conversion into cgs: - gas/dark matter density must be multiplied by 2.6666447e-30 to get them in g/cm^3 - B-field values are already in microGauss. For more details, see http://cosmosimfrazza.myfreesites.net/amr-clusters Vazza et al. 2017 MNRAS (https://academic.oup.com/mnras/article-abstract/doi/10.1093/mnras/stx2830/4584474)