2 6m July 8, 2019 16 32 64 128 2 6m in cm 2 6m in feet 2 6mm 2 6m 1 2 6m 3 7 2 6m 4 2 6m 3 2 6m2 2 6m 5 2 6m 6 2 6m 0 2 6mm permeable aggregate 2 6mm limestone 2 6mm grit 2 6mm clean stone
