## Common ground
All options describe letter boxes made from different solid, non-metallic or metallic materials.
## Options at a glance
**3925.90,3926.90 – made of plastic material**
- **Defining trait:** Constructed primarily from synthetic polymers like polypropylene or ABS.
- **Typical examples:** Outdoor mailbox with weather-resistant plastic casing.
- **Best fit when:** The box is lightweight, molded, and designed for durability in outdoor conditions.
**4421.9X – made of wood**
- ****Defining trait:** Crafted from natural timber or wood composites.
- **Typical examples:** Wooden mailbox with a rustic finish, often handcrafted.
- **Best fit when:** The product has visible grain, is painted or stained, and feels solid and organic.
**6911.90,6912.00,6913 – made of ceramic**
- **Defining trait:** Manufactured from fired clay or porcelain, often glazed.
- **Typical examples:** Decorative ceramic mailbox with artistic design.
- **Best fit when:** The box is fragile, non-conductive, and has a polished or ornamental appearance.
**7013.99 – made of glass**
- **Defining trait:** Constructed from transparent or translucent glass material.
- **Typical examples:** Glass-fronted mailbox allowing visibility of mail inside.
- **Best fit when:** The box has a see-through front panel, often for aesthetic or monitoring purposes.
**7323.9X – made of iron or steel**
- **Defining trait:** Fabricated from ferrous metal, typically with rust-resistant coating.
- **Typical examples:** Heavy-duty steel mailbox with lockable door.
- **Best fit when:** The box is strong, metallic, and designed for security or long-term outdoor use.
**7615.10 – made of aluminium**
- **Defining trait:** Made from lightweight, corrosion-resistant aluminum alloy.
- **Typical examples:** Sleek, modern mailbox with brushed finish.
- **Best fit when:** The box is light, shiny, and used in urban or coastal environments.
**7907.00 – made of zinc**
- **Defining trait:** Cast from zinc alloy, often with a smooth, dense surface.
- **Typical examples:** Decorative zinc mailbox with intricate detailing.
- **Best fit when:** The box has fine details, is heavy for its size, and shows casting marks.
## Key differences
| Material | Weight | Durability | Aesthetic | Common Use |
|--------|--------|------------|-----------|-------------|
| Plastic | Light | Moderate | Modern | General use |
| Wood | Medium | Low–moderate | Natural | Rustic/ornamental |
| Ceramic | Heavy | Low | Decorative | Indoor/outdoor art |
| Glass | Medium | Low | Transparent | Visibility-focused |
| Iron/Steel | Heavy | High | Industrial | Security-focused |
| Aluminium | Light | High | Sleek | Modern/urban |
| Zinc | Heavy | Moderate | Detailed | Decorative |
## How to choose
- Is the box made of molded plastic? → 3925.90,3926.90
- Does it look like natural wood with grain? → 4421.9X
- Is it glazed and fragile-looking? → 6911.90,6912.00,6913
- Does it have a transparent front panel? → 7013.99
- Is it heavy, metallic, and solid-looking? → 7323.9X
- Is it shiny, lightweight, and modern in finish? → 7615.10
- Is it detailed, dense, and possibly cast? → 7907.00
## Overlaps & pitfalls
A box could be made of steel with a plastic insert (e.g., glass window), but the primary material defines the HS Code. If unsure, prioritize the main structural material. No option is vague; all are clearly defined by material type