CORONA BRAND SIGING 1.Size:45*47cm 2.Usage:indoor board 3.Factory direct supply. Item# Model number KV-PP- ... society, because they are truly ideal for advanced hazard warning systems. Warning Sign Board are bright, easy to read, and are conserving energy ... PP materail. There are countless applications for Traffic Road Sign Board School safety areas, working zones, crossings, Parks, road closure, ...