Charlbury Bone Tumbled Grip R11The Charlbury Bone Grip is a 20 mm outdoor porcelain paver with the same natural limestone character, tumbled finish and wavy edge now with an R11 slip rating for confident footing outside. R11 slip resistance for external areas Tumbled surface and wavy edges for a convincingly aged look Robust 20 mm thickness for patios and terraces Low maintenance porcelain; frost and weather resistant Pairs with 10 mm indoor tile for seamless inside out schemes