Hardline Products boat registration numbers kit — 3-inch silver on black marine vinyl, USCG-compliant, 146-piece set

Hardline Products Series 320 is a complete 3-inch marine registration numbers kit that gives boats and PWCs a USCG-compliant, UV-resistant, fuel-hardy identification with a factory-finish look.

Whether you’re replacing worn numbers or outfitting a new hull, this 146-piece kit supplies everything needed to mark both port and starboard with bold, legible lettering. Built from 4-mil outdoor vinyl with a glossy UV coating and Super-Stick Adhesive, these silver-on-black decals are engineered to resist sun, salt, and fuel exposure while matching the clean, professional appearance of factory-installed graphics.

How do these decals meet legal and visibility requirements?

Series 320 letters are sized and styled to satisfy US Coast Guard and most state registration rules. The 3-inch block font provides high contrast at distance and easy reading during inspections or in low-light conditions.

• 3-inch block lettering for USCG and state compliance
• High-contrast silver on black for improved legibility
• Complete set contains enough characters for both sides of most vessels

Will the decals survive sun, saltwater, and fuel exposure?

Yes — the decals are manufactured from marine-grade 4-mil vinyl with a UV-protective glossy topcoat that helps prevent fading, yellowing, and scratches. Their construction and coating minimize damage from chemicals and sunlight without making claims beyond normal wear resistance.

• 4-mil heavy-duty vinyl for strength and tear resistance
• Gloss UV coating to slow fading and maintain shine
• Resists fuel splashes and routine marine abrasion

How easy is installation and what surfaces work best?

Installation is peel-and-stick with a high-hold Super-Stick Adhesive designed to form a permanent bond on common boat materials. Proper surface prep—clean, dry, and grease-free—ensures the best adhesion and long-term performance.

• Peel-and-stick application for quick placement
• Bonds to fiberglass, gel-coat, aluminum, painted metal, and many plastics
• Works on PWCs, dinghies, kayaks, and motorboats with similar surfaces

What’s included and how does this kit save time?

The 146-piece Series 320 kit contains multiple sets of letters and numbers so you can complete both sides of your vessel and keep extras for future changes. That eliminates multiple orders or trips to supply stores and produces a cohesive, factory-like result.

• Four sets of letters A–Z and four sets of numbers 0–9
• Enough characters to register two sides plus spares for replacements
• Pre-cut characters for consistent alignment and professional appearance

Who is this for: Boaters, PWC owners, marinas, and fleet managers who want USCG-compliant registration that stays readable and looks factory-finished. The kit suits anyone replacing old decals or outfitting new craft—especially those who need durable, weather-resistant lettering that adheres to fiberglass, gel-coat, painted metal, or common plastics. If you want long-lasting, high-visibility identification without frequent reapplication, the Hardline Products Series 320 offers a convenient, robust option designed for life on the water.