The Vialux 556TE1 convex traffic mirror can view in two directions covering an angle of Approx. 90 degrees. Warning message: SLOW. It is designed to be positioned at junctions with obscured visibility to prevent accidents. Easy to install & adjust to the exact position required Unbreakable Very light yet withstands severe weather conditions Viewing Distance 20 metres Supplied with bolts & brackets for fixing to walls or to 60-90mm diameter posts 3 year Polymir guarantee