Bernard Engraving PS30B3 Letter Black 3 inch Stick On In3I Letter Black 3In Stick On In3I The most widely used of the Bernard letters and numbers. 3 Gothic meets requirements for registration numbers in most states. These pressure sensitive vinyl-mylar letters and numbers are for fiberglass and metals boats. Slit backing for easy application. Available in solid Black or White. Attributes: Description: 3 Color: Black Pack: 10.