Hardline Products Boat Registration Numbers Kit — 3-Inch Silver/Black Vinyl, USCG-Compliant, Fade & Fuel Resistant

Hardline Products Series 320 is a complete 3-inch marine registration decal kit engineered for long-lasting, USCG-compliant hull identification that resists sun, fuel, and saltwater.

Give your boat, PWC, or personal watercraft a professional, factory-installed look while meeting legal registration requirements. The Series 320 kit supplies durable, high-contrast silver letters with a black outline on 4-mil outdoor vinyl and includes enough characters to mark both port and starboard sides. Designed and engineered in the USA, these decals balance long-term performance with easy, peel-and-stick installation so your identification stays legible and secure season after season.

How do these decals stand up to sun, salt, and fuel?

The Series 320 uses marine-grade 4-mil vinyl plus a UV-protective gloss that reduces fading and prevents the yellowing common with low-quality stickers. A fuel-resistant face film and scratch-tolerant finish keep the characters readable after regular use.

• 4-mil vinyl with UV glossy coating for fade resistance
• Fuel- and scratch-resistant face film
• Engineered to resist curling and edge lift in marine environments

Will these meet US Coast Guard and state registration rules?

Yes — the kit delivers 3-inch block font characters in a high-contrast silver with black outline designed for visibility and compliance. The size and typeface are chosen to satisfy USCG guidelines and most state boating requirements for registration lettering.

• 3-inch block characters for legal legibility
• High-contrast color scheme for quick identification
• Sufficient character count to create standard registration formats

What surfaces can I apply these decals to, and how permanent is the bond?

Super-Stick Adhesive is formulated to create an aggressive, long-term bond to common marine substrates. They peel and stick for simple placement yet resist peeling at speed, on wet surfaces, and after exposure to marine conditions.

• Bonds to fiberglass, gelcoat, and painted metal
• Adheres to aluminum, polyethylene, and SMC plastics
• Designed for high-speed and high-moisture durability

What comes in the kit and how easy is installation?

The Series 320 kit contains 146 pieces to cover both the port and starboard sides of your vessel, including multiple sets of letters and numbers so you can configure any registration. Installation is peel-and-stick; aligned placement and firm roller application are all that’s typically required for a secure finish.

• 146-piece set: four sets A–Z and four sets 0–9
• Includes characters for both sides of a hull and spare letters/numbers
• Simple peel-and-stick installation—use a roller or squeegee for best adhesion

Who is this for: The Hardline Products Series 320 registration kit is ideal for boat owners, tow-sport riders, marina managers, and dealers who want a legal, long-lasting identification solution that looks factory-installed. It’s especially suited for people who need a robust decal that resists fading, fuel, and salt exposure while offering enough characters to match any state registration format. If you value durability, professional appearance, and straightforward installation, this kit covers all the bases.