Statistics of the LOS velocities (v_los) of the pixels associated with each family of Stokes V shapes. Each plot contains the histograms of the v_los derived from both Fe i 630.15 nm (thick lines) and Fe i 630.25 nm (thin lines). The histograms are normalized to the total number of profiles in the family. The vertical dotted lines separate the upflow regime (left) and the downflow regime (right).