Magnet - Band-Aid Shape (3.5 x 1.125) - Outdoor Safe. Keep your message in front of your clients inside & outside. Personalized with your services and contact information, outdoor rectangular magnet is an effective marketing tool. Magnet keeps selling long after other products have been tossed. TuffMag (TM) magnets are 30 mil thick & will work on cars or any other metal surfaces are perfect for outdoor applications - water repellent, fade resistant & outdoor safe.