Magnet - 1.5" x 1.5" Square with Square Corners. Keep your message in front of your clients inside and outside. Personalized with your services and contact information, outdoor magnet is an effective marketing tool. Magnet keeps selling long after other products have been tossed away. TuffMag (TM) magnet is 30 mil thickness & will work on cars or any other metal surfaces are perfect for outdoor applications - water repellent, fade resistant and outdoor safe.