Clean Bold Registration Made EasyThis BOAT registration letter and number kit is built from premium marine grade vinyl for durable long-lasting identification. The self-adhesive design makes installation easy and the black block style helps create a clean readable look that meets USCG requirements when properly installed. 3 inch black block letters Premium marine grade vinyl Resists chemicals fading and scratches Meets USCG requirements when properly installed Includes letters numbers and 16 dashes