1)magnetic roof top car sign 2)different color can be chosen 3) ... quality with cheap price 4)material:PS Feature: 1) magnetic roof top car sign 2)color:red,green,yellow,bule,grey3 ... caps. Three shielded magnets firmly secure the hat to the roof, hood or any metal surface. Triangular design allows visability from ... , Wheel Off, or with a blank dry erase area. magnetic roof top car sign