## Common ground
All options describe janitorial carts based on their primary construction material.
## Options at a glance
**9403.20 – Base metal**
- **Defining trait:** Constructed primarily from metal like steel or aluminum.
- **Typical examples:** Steel utility carts with metal frames and trays.
- **Best fit when:** The cart has a rigid, durable structure built for heavy-duty use in commercial settings.
**9403.60 – Wood**
- **Defining trait:** Made primarily from solid or laminated wood.
- **Typical examples:** Wooden mop and bucket carts with wooden shelves.
- **Best fit when:** The cart has a traditional, aesthetic design using wood for trays or frame components.
**9403.70 – Plastic material**
- **Defining trait:** Constructed mainly from plastic (e.g., polypropylene, HDPE).
- **Typical examples:** Lightweight, stackable cleaning carts with molded plastic trays.
- **Best fit when:** The cart is lightweight, moisture-resistant, and designed for easy cleaning or indoor use.
## Key differences
| Feature | 9403.20 (Metal) | 9403.60 (Wood) | 9403.70 (Plastic) |
|------------------|------------------|----------------|--------------------|
| Material | Steel, aluminum | Wood | Plastic |
| Durability | High | Medium | Low to medium |
| Weight | Heavy | Medium | Light |
| Moisture resistance | Moderate | Low | High |
## How to choose
- Is the cart made mostly of steel or aluminum? → 9403.20
- Does it use wood for trays, shelves, or frame? → 9403.60
- Is it molded from plastic and lightweight? → 9403.70
## Overlaps & pitfalls
A cart with a metal frame and plastic trays may fit both 9403.20 and 9403.70. In such cases, use the **main structural material** as the deciding factor. If unsure, prioritize the material that forms the bulk of the cart’s body or load-bearing parts. Do not assume "plastic" means only 9403.70—some plastic components (like wheels) don’t define the classification