... , 5x, 6x, 7x seriesTemper: O, T1, T4, T5, T6, H12Shape: Round ShellSize: Flexible SizeSurface Treatment: Anodized, Power Coating, Sandblasting, Polishing, Grinding ... extruded Aluminum Frame and Back Cover/Housing/Body/ Heat Sink/ Shell for all kinds of Square & Round LED Panel lights.......