Marine Alpha-Numeric Registration Numbers and Letters – Fits Boats & PWC (Replaces QuickMarine, Hardline Products, STIFFIE)
Marine Alpha-Numeric Registration Numbers and Letters – Fits Boats & PWC (Replaces QuickMarine, Hardline Products, STIFFIE) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
Marine Alpha-Numeric Registration Numbers and Letters – Fits Boats ...
Marine Alpha-Numeric Registration Numbers and Letters – Fits Boats & PWC (Replaces QuickMarine, Hardline Products, STIFFIE) is backordered and will ship as soon as it is back in stock.
Product Details
QuickMarine provides these 3-inch blue Marine Alpha-Numeric Registration Numbers and Letters sticker decal kits for boats and personal watercraft. They are designed to meet the USCG's 3-inch minimum height requirement for vessel registration.
These kits serve as a direct replacement for QuickMarine BLU350EC, Hardline Products BLU350EC, and are similar in style to STIFFIE Whipline WL44.
- Simple peel-and-stick application.
- Outdoor rated for both freshwater and saltwater environments.
- Includes four complete sets of letters (A-Z) and numbers (0-9).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| QuickMarine | BLU350EC | |
| Hardline Products | BLU350EC | |
| STIFFIE | Whipline WL44 | Similar Style |
Compatible Applications
This kit is suitable for various applications as detailed below.
| Application Type | Usage | Suitability | Notes |
|---|---|---|---|
| Boats | Primary | Excellent | For vessel registration numbers |
| Personal Watercraft (PWC) | Primary | Excellent | Jet skis, waverunners, etc. |
| Cars | Secondary | Good | For custom lettering |
| Doors | Secondary | Good | For custom lettering |
| Mailboxes | Secondary | Good | For custom lettering |
| Indoor Decoration | Secondary | Good | For custom lettering |
Technical Specs
- Product Type
- Boat Registration Numbers & Letters Kit
- Material
- Marine Grade Vinyl with Permanent Waterproof Adhesive
- Color
- Blue
- Size
- 3 Inches (Height)
- Style
- Block Font, Solid Color
- Surface Recommendation
- Metal, Plastic, Glass, Fiberglass, Gel-Coat, Aluminum, Paint, Wood
- Number of Sets
- 4 Sets (A-Z and 0-9)
- Total Decals
- 144-146
- Special Features
- Fade Resistant, Oil Resistant, Peel and Stick, Scratch Resistant, Waterproof
- UV Protection
- Clear Coated
- Thickness
- 4mil Outdoor Vinyl
- Reusability
- Single Use
- Adhesive Type
- Super-Stick Adhesive
- Indoor/Outdoor Usage
- Outdoor Rated for Freshwater & Saltwater
- Regulations
- Meets US Coast Guard & State Guidelines (when installed correctly)
- Item Form
- Sheet
- Package Dimensions
- 9.8 x 4.21 x 0.75 inches
- Item Weight
- 8.4 ounces (238 grams)
What’s in the Box
- 1 x Marine Alpha-Numeric Registration Numbers and Letters Kit (Contains 4 sets of A-Z and 0-9)
Installation Notes
- Clean and dry the surface thoroughly before application.
- Peel the sticker from the backing sheet.
- Apply to the desired surface, starting from one edge.
- Press firmly from the center outwards to remove any air bubbles.
Troubleshooting & FAQ
Are these letters compliant with Coast Guard regulations?
Yes, the 3-inch height meets USCG and most state requirements for vessel registration numbers when applied according to guidelines. Always verify your local regulations for specific spacing and placement rules.
Will these stick to an inflatable boat or a textured surface?
These decals are designed for smooth, hard, non-porous surfaces like fiberglass, gel-coat, aluminum, and glass. Adhesion on flexible materials like PVC or heavily textured surfaces may be unreliable.
How many of each letter and number are included?
The kit contains four full sets of the alphabet (A-Z) and numbers (0-9), providing ample quantity for any standard registration number combination and matching vessel name.
Are the letters individual or on a single sheet?
The letters and numbers are individual peel-and-stick decals arranged on a backing sheet for easy handling and application.
Can these be removed and reused?
No, the decals feature a permanent, super-stick adhesive and are designed for single use. Attempting to remove them will likely destroy the decal.
What is the best way to ensure the letters are straight?
For best results, use a measuring tape and a pencil or non-permanent marker to create a level guideline on the application surface before you begin placing the decals.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout if they are available for your region.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — Our model provides fair pricing without compromising on materials or quality control.
Payment & Security
Payment methods
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