Our Gravel Grids are made with Heavy Duty Material, Best for Industrial and domestic driveways, car parks and ground reinforcement. The gravel grid is made entirely of recycled plastic and is a highly permeable, environmentally friendly alternative to a tarmac or concrete drive, walkway, or vehicle parking area. We give the gravel grid as an add-on to your aggregate purchase to save on haulage expenses, and it may be filled with any of our angular ornamental gravels sized between 10-20mm gravel grid driveway .