## Common ground
All options are bathtub seats made from metal, designed to provide support and stability when bathing.
## Options at a glance
**7324.90 – Made of iron or steel**
- **Defining trait:** Constructed from heavy-duty iron or steel, offering high strength and durability.
- **Typical examples:** Rigid, welded metal frames with anti-slip surfaces; often used in medical or long-term care settings.
- **Best fit when:** Long-term use, high weight capacity, or need for robustness is required.
**7615.20 – Made of aluminium**
- **Defining trait:** Lightweight and corrosion-resistant due to aluminum’s natural oxide layer.
- **Typical examples:** Folding or portable bath seats; common in home use or travel settings.
- **Best fit when:** Portability, ease of handling, or resistance to rust is a priority.
## Key differences
| Feature | 7324.90 (Iron/Steel) | 7615.20 (Aluminium) |
|------------------|------------------------|-----------------------|
| Weight | Heavy | Light |
| Durability | Very high | Moderate to high |
| Corrosion resistance | Low (requires coating) | High |
| Typical use | Permanent, medical | Portable, home |
## How to choose
- Is the seat intended for long-term or heavy-duty use? → 7324.90
- Does portability or rust resistance matter most? → 7615.20
## Overlaps & pitfalls
A bathtub seat may combine both materials (e.g., aluminum frame with steel supports), but the primary material determines classification. If unclear, prioritize the main structural material. No option is vague—both are clearly defined by base metal