This 1600 x 1200mm Core Drive 40-30 Gravel Grid Stabiliser is designed to stabilise loose gravel, prevent gravel migration and potholes, and to prevent weed growth. CORE DRIVE 40-30 has a large sheet format covering 1.92m² per panel with an integrated heat welded weed membrane on the underside of each panel. Core Drive 40-30 Gravel Grid Stabiliser is suitable for creating a completely porous new drive or laying over an existing concrete or tarmac base. This gravel grid stabiliser is made from high density polyethylene (HDPE) for maximum load bearing capabilities.