USATuff Custom Boat Registration Numbers and Lettering. Genuine SeaDek 3D registration number decals create a domed and three-dimensional look when applied to your Boat, Jet Ski, and PWC. Numbers and letters are set up in regulation 3” sizing to meet your State guidelines. Our numbers are easy to install with pre-aligned and accurately spaced pieces. Simply remove the backing and press them into place. You can’t mess it up! Our premium quality and professional presentation help your boat to stand out at the lake and rivers. Made with genuine SeaDek marine-grade EVA offering weather and stain resistance for years of use. Available in many color options. 100% fabricated in Idaho, USA and Ships fast!