Drainage Gravels, Concrete Blend, Reinforcing Mesh
The sizes available are 5mm, 10mm, 20mm and 4050mm. Larger sized rock is also on hand or can be sourced. Larger rock with its irregular nature has larger air spaces or voids when packed into a drainage system. This tends to lead to less restriction and greater water flow capacity. Unfortunately, as the size increases, it becomes harder to shovel!