Perfectly aligned registration numbers for your boat.For fiberglass, metal and PWC hulls, these stick-on plates are the easy way to create a professional-looking registration number installation on your boat.To receive your plates, all you need to do is:Purchase the pre-packaged code at one of our stores OR Purchase on-line at westmarine.com and receive your code and instructions by United States mail After receiving the code and instructions, go online and specify the registration number and the color black or white.Number plates will then ship by United States mail.Note: Registration numbers come superimposed on a clear background, so your boats color shows through. 3" block-style letters are USCG legal. Package includes two stick-on plates: One for the port side and one for the starboard side of the boat. Not recommended for inflatable boats.