## Common ground
All options refer to doors or windows classified by their primary material.
## Options at a glance
**3925.20 – Made of plastic material**
- **Defining trait:** Constructed primarily from synthetic polymers like PVC or polycarbonate.
- **Typical examples:** PVC window frames, plastic sliding doors.
- **Best fit when:** The product is lightweight, weather-resistant, and commonly used in residential buildings with low maintenance needs.
**4418.1X,4418.2X – Made of wood**
- **Defining trait:** Crafted from natural timber or wood-based composites (e.g., solid wood or laminated wood).
- **Typical examples:** Wooden front doors, timber-framed windows.
- **Best fit when:** The product emphasizes natural aesthetics, traditional design, or high thermal insulation.
**7308.30 – Made of iron or steel**
- **Defining trait:** Constructed from ferrous metals, often used for strength and security.
- **Typical examples:** Steel security doors, iron window grilles.
- **Best fit when:** The product prioritizes durability, fire resistance, or high-security applications.
**7610.10 – Made of aluminium**
- **Defining trait:** Fabricated from lightweight, corrosion-resistant aluminum alloys.
- **Typical examples:** Aluminum sliding doors, curtain wall systems.
- **Best fit when:** The product requires long-term durability, minimal maintenance, and modern architectural integration.
## Key differences
| Feature | Plastic | Wood | Iron/Steel | Aluminium |
|------------------|---------------|--------------|---------------|---------------|
| Weight | Light | Heavy | Very heavy | Light |
| Durability | Moderate | Moderate | High | Very high |
| Thermal insulation | Good | Excellent | Poor | Low |
| Aesthetic | Modern, uniform | Natural, warm | Industrial, rugged | Sleek, contemporary |
## How to choose
- Is the material primarily plastic (e.g., PVC)? → 3925.20
- Is it solid wood or timber-based? → 4418.1X,4418.2X
- Is it made of heavy metal with a focus on security? → 7308.30
- Is it aluminum alloy with a modern, lightweight design? → 7610.10
## Overlaps & pitfalls
A product may combine materials (e.g., wooden frame with aluminum cladding), but the primary material determines classification. If unclear, prioritize the dominant structural material. No option is inherently more accurate—choose based on the main component