4.1.material:hign quality metal 2.shape:Type A 3.usage:construction site operation safety of personnel 4goodquality with best Fix 2 ¢ 48.6 tubes with diameters of 2M to the upper and lower clamps, forming one 1m high and 2m long isolation area, and then put it to where is need to be isolated.Usage: Rconstruction, temporary maintenance area, construction sites, parkingDetailUsage