... supermarket etc Item NameConvex LensMaterial Stainless Steel mirror surface and Plastic behindUsageApplicable to the street corner, factories, supermarkets, ... mirror image is clear, clear and convenient simple installation;4· lens barrel light, safe and reliable;5· just with a ... the pedestrians and vehicles, traffic cntrolSizeDiamete:450,600,800,900,1000mm The reflection principle of convex mirror Our ...