This Ice Alert highly-reflective temperature-sensitive indicator helps prevent trips slips and falls on icy sidewalks and parking lots. These 6" diameter indicators have a colored wheel that rotates from white to blue as temperatures approach freezing. Motorists and pedestrians are alerted to the dropping temperatures and are made aware that ice may be present or forming. These universal-mount IceAlert units are delivered pre-assembled and are simply bolted onto existing poles, posts, or other structures. Great for utility employee parking lots, garage, and entrance walkways. Approximately 7" by 10".