## Common ground
All options are types of water closet pans (toilets) differentiated by their primary material.
## Options at a glance
**3922.90 – Plastic**
- **Defining trait:** Made from synthetic polymer resin, typically lightweight and moldable.
- **Typical examples:** Injection-molded plastic toilets, low-cost residential models.
- **Best fit when:** Weight, cost, or ease of installation are priorities.
**4016.99 – Rubber**
- **Defining trait:** Constructed from vulcanized rubber; rare and not standard for full water closets.
- **Typical examples:** Not commonly used; may refer to seals or components, not complete pans.
- **Best fit when:** Only if the product is a specialized rubber-based fixture (highly unusual).
**6810.99 – Cement concrete or artificial stone**
- **Defining trait:** Heavy-duty, durable material often used in industrial or public settings.
- **Typical examples:** Public restroom toilets, heavy-duty commercial units.
- **Best fit when:** High durability and load-bearing capacity are needed.
**6910 – Ceramic**
- **Defining trait:** Fired clay with glazed surface; standard for most residential and commercial toilets.
- **Typical examples:** Traditional porcelain toilets, standard bathroom fixtures.
- **Best fit when:** Common use, hygiene, aesthetics, and widespread availability matter.
**7017 – Glass**
- **Defining trait:** Transparent or translucent material; extremely rare for full water closets.
- **Typical examples:** Experimental or decorative designs; not functional for standard use.
- **Best fit when:** Aesthetic or artistic design is the primary purpose.
**7324.90 – Iron or steel**
- **Defining trait:** Metal construction, often coated to prevent rust; used in heavy-duty applications.
- **Typical examples:** Industrial toilets, military or outdoor facilities.
- **Best fit when:** Extreme durability and resistance to impact are required.
**7418.20 – Copper**
- **Defining trait:** High corrosion resistance and aesthetic appeal; very rare for toilets.
- **Typical examples:** Luxury or historical fixtures; not practical for mass use.
- **Best fit when:** Decorative, high-end, or heritage-style installations.
**7615.20 – Aluminium**
- **Defining trait:** Lightweight metal with good corrosion resistance; uncommon for full pans.
- **Typical examples:** Specialized or modular toilets in transport or mobile units.
- **Best fit when:** Weight reduction is critical (e.g., in vehicles).
**7907.00 – Zinc**
- **Defining trait:** Used mainly for plating or small parts; not suitable for full water closet pans.
- **Typical examples:** Not applicable to complete toilets; likely misclassified.
- **Best fit when:** Only if the product is a zinc-coated component, not the pan itself.
## Key differences
| Material | Durability | Weight | Common Use | Standard Application |
|--------|------------|--------|------------|-----------------------|
| Plastic | Low | Light | Residential | Yes |
| Rubber | Very low | Light | N/A | No |
| Concrete | High | Heavy | Public/industrial | Yes |
| Ceramic | High | Medium | Residential/commercial | Yes |
| Glass | Low | Medium | Decorative | No |
| Iron/Steel | Very high | Heavy | Industrial | Yes |
| Copper | High | Medium | Luxury | Rare |
| Aluminium | Medium | Light | Mobile units | Limited |
| Zinc | Low | Medium | Coatings | No |
## How to choose
- Is it made of glazed, fired clay? → 6910
- Is it lightweight and molded from plastic? → 3922.90
- Is it heavy, solid, and used in public spaces? → 6810.99 or 7324.90
- Is it metal but not ceramic or plastic? → Check for steel (7324.90), copper (7418.20), etc.
## Overlaps & pitfalls
- Plastic, ceramic, and concrete are standard; others are rare or misclassified.
- Glass, zinc, and copper are unlikely to be used for full pans—check if the product is truly a complete water closet.
- If multiple materials are present (e.g., metal frame with plastic pan), prioritize the **main structural material** of the pan itself.
- No clear priority rule; choose based on the **primary material of the bowl**