Left: illustration of various radii of interest overlaid on the gas density distribution of a merging cluster from a hydrodynamic simulation (rotated to appear similar to the A3391/95 structures, from Reiprich et al. 2013; Roncarelli et al. 2006). Right: eROSITA wavelet-filtered image as in Fig. 5 but removing all areas with less than 1 ks effective exposure and using a color scheme to highlight low-surface-brightness features. Overlaid are the same radii for A3391 as shown on the left for the simulated cluster.