Registration Number Kit – Boats & PWC (Replaces QuickMariner, STIFFIE, Hardline Products)
Registration Number Kit – Boats & PWC (Replaces QuickMariner, STIFFIE, Hardline Products) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Registration Number Kit – Boats & PWC (Replaces QuickMariner, S...
Registration Number Kit – Boats & PWC (Replaces QuickMariner, STIFFIE, Hardline Products) is backordered and will ship as soon as it is back in stock.
Product Details
This is a complete Boat & Personal Watercraft Registration Number Kit – Black 3" Decals (4 Sets), designed for all recreational and commercial vessels. The kit features 3-inch black alphanumeric decals that meet US Coast Guard requirements for vessel registration when properly installed. Each kit provides four full sets of letters (A-Z) and numbers (0-9), for a total of 144 individual decals.
These decals serve as direct replacements for QuickMariner 4 Sets 3" Marine Alpha-Numeric (Black), STIFFIE Uniline Black 3" ID Kit, and Hardline Products 320CLBLK.
- Simple peel-and-apply adhesive backing for easy installation.
- Constructed from marine-grade vinyl for superior resistance to UV rays, fuel, and fading.
- Includes four complete sets of all necessary letters and numbers for registering multiple vessels or for future replacements.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| QuickMariner | 4 Sets 3" Marine Alpha-Numeric (Black) |
| STIFFIE | Uniline Black 3" ID Kit |
| Hardline Products | 320CLBLK |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Application Type | Details |
|---|---|
| Boats | All recreational and commercial vessels requiring registration numbers |
| Personal Watercraft | Jet Skis, WaveRunners, Sea-Doos, and other PWCs |
| Required Placement | Both port and starboard sides of vessel |
| Regulatory Compliance | Meets US Coast Guard requirements when installed per instructions |
Technical Specs
- Product Type
- Boat Registration Decal Kit
- Installation
- Peel and apply adhesive
- Color
- Black
- Character Height
- 3 inches (76.2 mm)
- Character Style
- Block font
- Material
- Marine-grade vinyl with UV protection
- Adhesive Type
- Permanent waterproof adhesive
- Weather Resistance
- UV resistant, fuel resistant, fade resistant
- Scratch Resistance
- Yes
- Chemical Resistance
- Resistant to fuel spillage and chemical deterioration
- Quantity
- 4 complete sets (A-Z, 0-9) - 144 total decals
What’s in the Box
- 4 x Sets of A-Z letters (Black)
- 4 x Sets of 0-9 numbers (Black)
Installation Notes
- Thoroughly clean the application area with soap and water or isopropyl alcohol and allow it to dry completely.
- Plan your decal placement to ensure it meets USCG and local spacing requirements—typically a hyphen or a space of one character width between letter and number groups.
- Carefully peel a decal from its backing, avoiding touching the adhesive.
- Apply the decal to the prepared surface, starting from one edge and smoothing it down to prevent air bubbles.
- Use a squeegee or credit card to press firmly across the entire decal surface, ensuring a strong bond.
- Allow the adhesive to cure for at least 24 hours before exposing the vessel to water for maximum longevity.
Troubleshooting & FAQ
How do I properly space these registration numbers?
According to US Coast Guard regulations, characters must be separated by a space or hyphen equivalent to one character's width (e.g., "FL 1234 AB" or "FL-1234-AB"). Always verify specific spacing and placement rules with your state's boating agency.
Are these decals compliant with all regulations?
The 3-inch character height meets federal US Coast Guard requirements. However, state or local authorities may have additional rules regarding font, spacing, or placement. Always confirm with your local registration agency to ensure full compliance.
What's the difference between these and OEM decals?
These aftermarket decals are designed to meet or exceed OEM specifications for durability and visibility using high-quality, marine-grade materials. They provide a comparable, cost-effective alternative for vessel registration.
How long will these decals last?
When applied correctly to a clean, properly prepared surface, these marine-grade vinyl decals are designed to last for many years, typically 5-7 years or more, even with continuous exposure to sun, water, and fuel.
What are signs my decals need replacing?
You should replace your decals if you see significant fading that reduces contrast with the hull, or any peeling, cracking, or lifting at the edges. Damaged decals can compromise your vessel's compliance and visibility.
Can I remove these decals without damaging my boat?
Yes. Gently heating the decal with a hairdryer will soften the permanent adhesive, allowing you to peel it off. Any remaining residue can be safely removed with a marine-grade adhesive remover and a soft cloth.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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