ROUND CAR MAGNET. MAGNETIC AUTO SIGNS ARE A GREAT WAY OF ADVERTISING, SHOWING YOUR TEAM OR SCHOOL SPIRIT, AND ARE EASILY REMOVABLE. MAGNETIC MATERIAL IS 30 MIL THICK. UV COATED FOR WEATHER PROTECTION. CUSTOMIZE YOUR OWN CIRCLE MAGNET OR USE OUR STOCK ARTWORK AND MASCOTS. 4" DIAMETER X 30MIL THICK