... 6082-T67 aluminum alloy material 2.portable 3.light-weighted control crowd concert barricade Features: 1.6082-T67 aluminum alloy ... barrier is developed to use as safety device to control crowds in various types of events,ranging from pop ... in public events, sports ,concerts, festivals, gatherings, parade routes, block parties, waiting lines,grand openings, parking lots,construction sites,carnivals ...