Specifications include, but are not limited to: Rubber cutting edges manufactured with compressed recycled rubber. Each cutting edge will be secured with a minimum of two 1-1/4 inch, or larger, threaded steel rods, running the full length of the edge and secured every 12 inches using steel retaining plates. Each edge will be assembled onto steel channel with steel along the top length, to allow for mounting hardware. Mounting hardware consists of 5/8 inch thick, rectangular steel washer plates, measuring 3 inches X 4 inches. Each mounting plate will have a center opening measuring 1-1/16 inches X 1-1/16 inches. Mounting plates will include grade 8, 1 inch diameter X 4 inches long, coarse thread plow bolts and corresponding 1 inch coarse thread nuts.