## Common ground
All options refer to house numbers and letters used for identifying residential addresses.
## Options at a glance
**3919,3920,3921,3926.90 – made of plastic material**
- **Defining trait:** Constructed from synthetic polymer materials, often lightweight and weather-resistant.
- **Typical examples:** Plastic numerals with adhesive backing, molded house signs.
- **Best fit when:** Budget-friendly, easy-to-install, outdoor use in moderate climates.
**4421.99 – made of wood**
- **Defining trait:** Crafted from natural wood, often hand-finished or painted.
- **Typical examples:** Wooden plaques with carved numbers, rustic-style house signs.
- **Best fit when:** Aesthetic appeal, traditional or country-style homes, custom craftsmanship.
**6914.10 – made of porcelain or china**
- **Defining trait:** Fired ceramic with a glossy, durable surface; often decorative.
- **Typical examples:** Porcelain house numbers with classic fonts, vintage look.
- **Best fit when:** High durability, elegant appearance, historical or formal homes.
**6914.90 – made of ceramic**
- **Defining trait:** Non-porcelain fired clay; less glossy than porcelain but still durable.
- **Typical examples:** Handmade ceramic numbers, artisanal house signs.
- **Best fit when:** Unique design, artistic or handmade appearance, moderate weather exposure.
**7020.00 – made of glass**
- **Defining trait:** Transparent or translucent material; often etched or printed.
- **Typical examples:** Frosted glass numbers, backlit glass signs.
- **Best fit when:** Modern design, visibility at night, minimalist style.
**8310.00 – made of base metal**
- **Defining trait:** Constructed from iron, steel, or similar metals; often rust-resistant.
- **Typical examples:** Metal house numbers with brushed finish, industrial look.
- **Best fit when:** Long-term durability, heavy-duty use, urban or industrial settings.
**8531.20 – digital**
- **Defining trait:** Uses electronic display (LEDs, LCD) to show numbers; may be programmable.
- **Typical examples:** Digital address displays, smart house number systems.
- **Best fit when:** High-tech homes, remote access, dynamic or changing addresses.
**9405.6X – illuminated**
- **Defining trait:** Equipped with built-in lighting (LEDs, bulbs) for nighttime visibility.
- **Typical examples:** Backlit house numbers, neon-style signs.
- **Best fit when:** Nighttime readability, security, or decorative lighting.
## Key differences
| Option | Material | Technology | Visibility | Aesthetic |
|-------|----------|------------|------------|-----------|
| Plastic | Synthetic | None | Standard | Modern, basic |
| Wood | Natural | None | Standard | Rustic, warm |
| Porcelain | Ceramic | None | High | Elegant, classic |
| Ceramic | Clay-based | None | Medium-high | Artisanal |
| Glass | Transparent | None | High (if lit) | Sleek, modern |
| Base metal | Metal | None | High | Industrial, durable |
| Digital | Varies | Electronic | High | Futuristic |
| Illuminated | Varies | Light source | Very high | Decorative, functional |
## How to choose
- Is the material natural or synthetic? → Plastic, Wood, Ceramic, Porcelain, Glass, Metal
- Does it use electronic display or programming? → Digital
- Is it lit from within (e.g., LED backlight)? → Illuminated
- Is it primarily for style and design? → Porcelain, Ceramic, Glass, Wood
## Overlaps & pitfalls
- A **digital** sign may also be **illuminated** (e.g., LED display).
- A **glass** or **ceramic** number can be **illuminated**.
- **Porcelain** and **ceramic** are both fired clay; distinction is in finish and density.
- If multiple traits apply, choose based on the product’s **main function**: e.g., “digital” takes priority over “illuminated” if it’s a smart display