## Common ground
Both options are types of rack or hook rails used for storage or organization.
## Options at a glance
**3924.90 – Made of plastic material**
- **Defining trait:** Constructed primarily from plastic, offering lightweight and corrosion-resistant properties.
- **Typical examples:** Plastic shelf brackets, bathroom towel hooks, kitchen pot racks.
- **Best fit when:** The product is lightweight, non-metallic, and intended for indoor or low-load use.
**8302.50 – Made of base metal**
- **Defining trait:** Constructed from ferrous or non-ferrous metals (e.g., steel, aluminum), providing higher strength and durability.
- **Typical examples:** Industrial wall-mounted tool racks, metal coat hooks, heavy-duty storage rails.
- **Best fit when:** The product must support significant weight or withstand harsh environments.
## Key differences
| Feature | 3924.90 (Plastic) | 8302.50 (Base Metal) |
|---------------------|--------------------------|----------------------------|
| Material | Plastic | Metal (e.g., steel, aluminum) |
| Weight | Light | Heavy |
| Load capacity | Low to moderate | High |
| Durability | Moderate (prone to cracking)| High (resistant to wear) |
## How to choose
- Is the product made of plastic? → 3924.90
- Does it contain metal (e.g., steel, aluminum)? → 8302.50
## Overlaps & pitfalls
A rack may combine plastic and metal parts (e.g., plastic hooks on a metal rail), but the primary material determines classification. If unsure, prioritize the **main structural material**. The term "base metal" includes both ferrous and non-ferrous metals—do not assume it means only iron or steel