Uni Eco-Stone™ makes efficient use of land that might not otherwise be developed because of stormwater retention and limitations on the impervious area allowed on a site. This paver gives the designer a tool to minimize the environment's impact on land development. Made with the same strength, durability and aesthetics as solid concrete pavers. Uni Eco-Stone™ is a natural way to handle storm water runoff, conserve rainwater, recharge groundwater storage, improve water quality and mitigate pollution on surrounding surface waters. Brick PaversPermeable.