Premium Heavy-Duty Interlocking Concrete Pavings Ruby Square Product Details: Size: 151mm x 406mm Area Coverage: 29 pcs/m2 Thickness: 60mm Strength: 60 mpa (average compaction strengths tested after 14 days) Available ColoursStandard Colors: Red, Yellow, Grey, BlackPremium Colors: Jet Black, Green, Brown, White & Blue Our Designs