Observables of selected OPUs. The four columns on the left show different examples of OPUs. The rightmost column shows the penumbra of a sunspot for comparison (AR 10933 observed on 6 January 2007). The top row shows continuum intensity maps (I_c) covering using the full FOV of the Hinode/SOT-SP scan. The rows below cover a smaller FOV of 32″ × 32″ centred on the individual OPUs (or sunspot penumbra in the rightmost column). Rows 2 to 6 show the I_c of the region of interest, strength of the magnetic field B, longitudinal component of the magnetic field B_LOS, inclination of the magnetic field γ relative to the line-of-sight, and the LOS velocity v_LOS, respectively. In all panels, the contours indicate the OPUs (or sunspot penumbra in the rightmost column). We adjusted the dominant polarity of B_LOS to be positive in the individual OPUs for better comparison. We show the magnetic field information and the velocity at τ = 1. The red horizontal lines in the top row indicate a length of 20″ and the arrows in the second-row point towards disk centre.