4th of July Yard Sign, One Nation Under God Patriotic Stars Stripes Memorial Day Independence Day American Veteran 4th of July Yard Sign with Metal H-Stake. Economical and durable, our Coroplast Yard Signs are a staple of outdoor advertising. These 4th of July God Bless America Patriotic Stars and Stripes American Flag Memorial Day One Nation Under God Independence Day Fourth of July Yard Sign full color direct printed graphics are vertically fluted for use with an H-Stake. Coroplast is typically used for yard, parking, real estate, and election signs. They are waterproof.