Bernard Engraving PS30BK Letter Black 3 inch Stick On Inki Letter Black 3In Stick On Inki 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: K Color: Black Pack: 10.