Distributions of all the perpendicular flow rates measured at 0, π/2, π, and 3π/2 for the 3D filament spines in the active region. The dashed black and solid grey lines sit at the mean and median flow rate values, respectively, and the numbers are shown in the legend. Left: filament 1, which feeds the central massive clump. Right: filament 3, which feeds the non-central clump.