## Common ground
All options are types of dowels—cylindrical rods used to join materials, typically in woodworking or construction.
## Options at a glance
**3925.90,3926.90 – Made of plastic material**
- **Defining trait:** Constructed from synthetic polymers, often lightweight and corrosion-resistant.
- **Typical examples:** Nylon, polyethylene, or PVC dowels used in furniture or outdoor projects.
- **Best fit when:** The product is non-metallic, flexible, or intended for moisture-prone environments.
**4409 – Made of wood**
- **Defining trait:** Crafted from natural wood, commonly used in traditional carpentry and joinery.
- **Typical examples:** Hardwood dowels (e.g., oak, maple) for cabinetry or wooden frame assembly.
- **Best fit when:** The product is organic, sawn or turned from timber, and used in classic woodworking.
**7318.19 – Made of iron or steel**
- **Defining trait:** Metal construction, offering high strength and durability under heavy load.
- **Typical examples:** Steel dowels for structural reinforcement in concrete or metal frameworks.
- **Best fit when:** The product is metallic, rigid, and used in industrial or load-bearing applications.
## Key differences
| Feature | Plastic | Wood | Iron/Steel |
|------------------|---------------|--------------|----------------|
| Material | Synthetic polymer | Natural wood | Metal alloy |
| Strength | Moderate | Medium | High |
| Corrosion resistance | High | Low | Moderate (if coated) |
| Common use | Indoor, light-duty | Traditional carpentry | Structural, industrial |
## How to choose
- Is the dowel made of plastic or synthetic material? → 3925.90,3926.90
- Is it made from natural wood (e.g., sawn or turned)? → 4409
- Is it metallic and rigid, used in heavy-duty or structural applications? → 7318.19
## Overlaps & pitfalls
A dowel could be coated (e.g., steel with plastic coating), but the primary material determines classification. If unclear, prioritize the **main structural material**. No option is vague—each reflects a distinct material category