Welcome Aboard!

10% savings across all ranges sitewide for new customers · Terms apply

FLASHSALE26

3-Inch Boat Registration Number and Letter Decal Kit – Black Vinyl

Regular price $19.99

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

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.

If you have any questions, feel free to email us at info@seasierra.com, and we’ll get back to you within 20–36 hours.

Product Details

These 3-inch boat registration number and letter decals are designed for displaying registration codes on boats, yachts, personal watercraft (PWC), pontoons, kayaks, and other vessels where registration identification is required. Made from durable outdoor vinyl with a self-adhesive backing, the decals are intended for application to clean, smooth marine surfaces.

The character format is commonly used as a replacement for 3-inch registration decal sets sold under references such as NorthBoat, STIFFIE Hardline, Whipline and Techtron series, Hardline Products Series 200, 300, 320, 350 and 400, and QuickMarine 3-inch alphanumeric kits. Verify the character style, color, quantity and applicable local marking requirements before ordering.

  • Simple Installation: Peel and stick the decals to a clean, dry, smooth surface.
  • Outdoor Marine Use: 4 mil outdoor vinyl is designed for exposure to water, sunlight and normal marine conditions.
  • Complete Character Selection: Includes multiple letter and number sets for creating registration codes and identification markings.

Part Number Matrix

The references below are provided as product-family and replacement references. Confirm dimensions, color, character style and package quantity before purchase.

Brand / Manufacturer Equivalent Series / Product Reference
NorthBoat 4 Sets 3-Inch Stickers
STIFFIE Hardline / Whipline / Techtron Series
Hardline Products Series 200 / 300 / 320 / 350 / 400
QuickMarine 3-Inch Alphanumeric Kits

Vessel Compatibility

These decals are intended for registration identification on vessels with a suitable clean, smooth application surface. Registration placement, character size, color contrast and other requirements vary by jurisdiction; check the rules that apply to your vessel.

Vessel Type Typical Use Application Notes
Boats Registration identification Apply to a smooth, clean hull or other approved surface.
Yachts Registration identification Confirm local placement and contrast requirements.
PWC / Jet Skis Registration identification Use only on a properly prepared smooth surface.
Pontoons Registration identification Choose a contrasting color for visibility.
Kayaks Registration identification where required Check local registration rules and available mounting area.

Technical Specs

Product Type
Boat registration number and letter decals
Installation
Peel and stick
Material
4 mil premium outdoor vinyl
Color
Black
Character Height
3 inches (76.2 mm)
Weight
Approximately 8.8 ounces (249 g) per set
Backing
Adhesive-backed
Intended Environment
Outdoor and marine applications
Other Attributes
Water-resistant, UV-resistant, scratch-resistant and fuel-resistant vinyl with high-tack adhesive

What’s in the Box

  • 4 x Sets of letters A-Z, totaling 104 individual letter decals
  • 4 x Sets of numbers 0-9, totaling 40 individual number decals
  • Total: 144 individual decals

Installation Notes

  1. Clean the application surface with soap and water to remove dirt, wax and oil, then rinse thoroughly.
  2. Allow the surface to dry completely before application.
  3. Plan the layout and use masking tape to establish a straight guideline.
  4. Measure and mark character spacing before applying the decals.
  5. Peel each decal from its backing paper without touching the adhesive.
  6. Apply the decal and press firmly from the center outward to reduce air bubbles.
  7. Use a squeegee or credit card to smooth the decal and improve contact.
  8. Allow the adhesive to cure for at least 24 hours before exposing the vessel to water.

Troubleshooting & FAQ

Are these decals compliant with registration regulations?

The characters are 3 inches high, but registration requirements differ by location. Before installation, confirm the required character height, placement, spacing and color contrast with the applicable state or local boating authority.

How can I align the decals properly?

Use masking tape as a straight guide, then measure and mark the spacing between characters before removing the backing.

Can I remove the decals without damaging the boat’s surface?

Gently warm the decals with a hairdryer or low-temperature heat gun and peel them carefully. Test any adhesive remover on an inconspicuous area first and use only a product safe for the vessel’s finish.

How long will the decals last?

Service life depends on surface preparation, sun exposure, weather, cleaning methods and use. Proper application to a clean, dry surface helps maximize adhesion and durability.

What should I do if a decal starts peeling?

Peeling may result from contamination, moisture or high-pressure water striking an edge. If the decal has only recently lifted, clean and dry the area and press it down firmly. Replace the decal if the adhesive or vinyl is damaged.

Do I need to register my kayak or PWC?

Requirements vary by state and vessel type. Check with the relevant state or local boating authority for current registration rules.

Is this an OEM product?

This is an aftermarket replacement decal kit, not an OEM-branded component. Confirm the dimensions, color, character style and quantity against your application before purchase.

What are the shipping and return terms?

Shipping availability, delivery estimates, warranty coverage and return eligibility are determined by the applicable order and store policies. Review the current policy information at checkout or contact support before ordering.

Safety & Important Information

  • Check local registration requirements before applying the decals.
  • Verify the character height, color, quantity and application surface for your vessel.
  • Do not apply decals to dirty, wet, heavily textured or wax-coated surfaces.
  • Use care when working around painted, gel-coated or otherwise delicate marine finishes.

About Sea Sierra

  • Marine-Focused Products — We supply parts and accessories selected for practical marine maintenance and identification needs.
  • Practical Replacement Solutions — Product details are provided to help you compare dimensions, materials and application requirements.
  • Support When You Need It — Contact support if you need help confirming product details before ordering.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Cartes Bancaires
  • Diners Club
  • Discover
  • Google Pay
  • JCB
  • Maestro
  • Mastercard
  • PayPal
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.