STRONG enough to survive high speeds, without the commitment of an adhesive sticker. Made out of 35MIL Magnetic Material. The earth magnet is 5.5 inches. CLEANING These can be used over and over again. Just remember to remove them before washing your car, wipe them off and reapply! DESIGNED and produced here in the USA. We've got a team of creative minds that get together and come up with new designs every month. You're guaranteed a unique, high-quality magnet. EASY TO USE AND 100% REUSABLE. These cute car accessories are great for indoor or outdoor use and can be used again and again for many holidays, birthdays, special events to come. Easily added and removed. These magnets can also be used on metal apartment doors, metal mailboxes, lockers, or your refrigerator. An awesome magnet for lockers, science classrooms, teachers, cars, fridge, and other magnetic surfaces. These are Perfect for Both Indoor and Outdoor Use. They Can Be Place on Your Car as a Fun Way to Celebrate Halloween or Used Indoor for Parties. These are Perfect for Placing on Garage Doors, School White Boards or Lockers, Dishwashers, Refrigerators, or Any Other Magnetic Surface.