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Through more than 30 years, Keystone and its network of producers among them, Carmelo, have become the world’s leading source of segmental retaining wall and landscape systems.Structural retaining walls continue to be trusted by engineers, architects and contractors worldwide to provide the best site solutions for commercial,

ArmorFlex®ArmorFlex is a flexible, interlocking matrix of cellular concrete blocks of uniform size, shape, and weight used for hard armor erosion control. ArmorFlex blocks have specific tested hydraulic capacities and are laced longitudinally with revetment cables to provide ease-of-handling and rapid installation.Research Proven Erosion Control PerformanceArmorFlex revetment