Convex round surveillance mirrors, made from a strong, light, durable acrylic material. Allows clear view of large areas, corridors and corners and is easy to install to almost all surfaces. Available in 400mm Dia, Circular, 2kg max. Observing distance 3m, 500mm dia circular,2. 5kg max, observing distance 5m and 600mm dia circular, 3kg max, observing distance 7m.