Tuff Post is accepted by the Federal Highway Administration as a crashworthy traffic control device for use on the national highway system. Made of strong, flexible polypropylene with reactive spring assembly to meet demands of high-speed roadways. Tested and certified to withstand 50 hits at 55 mph and still remain upright with no vertical or horizontal listing. Ideal for work zones, parking lots, airports, high-speed traffic lanes, HOV lanes and curves. Available in yellow, white and orange in 36-, 42- and 48-in. lengths. Impact Recovery Systems Inc., San Antonio, Texas