The hull ID number tag measures 4.0" x1" (100mm X 25mm)。Tag is made of anodized aluminum with screen printed outdoor UV resistant inks. It included Title: VEHICLE IDENTIFICATION : TAG IS COMPLIANT WITH ALL DOT/DMV REGULATIONS. The BLANK tag(s) are ready for you to stamp or engrave yourself or take to your local company for marking. Warm tips： because this item need to engrave many number or letters, so it is very easy to make mistake. Avoiding this problem, suggested that you can order 2 of it. in case that mistake and need to reorder it again. or you can order the pre-engrave one, it will save you more time , and guarantee no mistake on it