Square corners magnet – 30 Mil makes a good car magnet and it can be utilized for outdoor promotions. Advertisers can involve this magnet for all harsh promotional campaigns because it is UV safe. This magnet is defensive against heat, sweat, moisture, light and other adversities. This magnet may not easily show up against a long distance, but advertisers can always make heads turn by customizing it with specialized characters such as brand logos, symbols, etc.