Horn-Mount Kit for Cooper Notification’s High Power Speaker Array (HPSA). The HRNMT-100 mounts on a round pole with diameters from 6 1/2” to 3’ and includes both the upper and lower bracket, chain units, u-bolts and 10 ft. mast. Mast, chain and brackets are made of galvanized steel. Assembly is rated up to a wind speed of 140 mph (3 second gust).