Coast Guard Vessel Documentation Number USCG Vessel Official Number Brushed Bronze Version. This is laser engraved into durable brushed bronze look acrylic. Black numbers on bronze background. The material is two layer acrylic by Rowark. It is not painted. Coast Guard Vessel Documentation Plaque / Placard Strong, permanent, laser-engraved, plastic placard to display documentation number. 3" high, Arabic numbers. Number has leading “NO.” as required. Mounting holes included. 4.5" x 18" overall size 1/16" thick, durable plastic. Includes a FREE mini tag for your keychain. Coast Guard Documentation Placard, Vessel Official Number