Alliance Gator NGG5050-06150 6' x 150' 50-50 Biaxial Grid - The Gator 50-50 Grid is a biaxial geogrid that provides strength and longevity. It prevents failure of the internal structure of high retaining walls and controls erosion in steep slopes applications. It has a high molecular weight as well as high-tenacity polyester yarns which are woven in tension and finished with a PVC coating. Its design allows it to be installed in both directions.