## Common ground
All options refer to protective enclosures for valves and meters used in utility infrastructure.
## Options at a glance
**3926.90 – Made of plastic material**
- **Defining trait:** Constructed primarily from plastic, offering lightweight, corrosion-resistant properties.
- **Typical examples:** Plastic meter boxes for gas/water, roadside valve enclosures.
- **Best fit when:** Used in corrosive environments, need for low weight, or where electrical insulation is required.
**7325.10 – Made of iron or steel**
- **Defining trait:** Fabricated from ferrous metal, providing high durability and impact resistance.
- **Typical examples:** Heavy-duty valve boxes for industrial pipelines, steel meter enclosures in urban settings.
- **Best fit when:** High security, long-term structural integrity, or mechanical protection is critical.
## Key differences
| Feature | 3926.90 (Plastic) | 7325.10 (Iron/Steel) |
|---------------------|--------------------------|----------------------------|
| Material | Plastic | Iron or steel |
| Weight | Light | Heavy |
| Corrosion resistance| High | Low (unless coated) |
| Durability | Moderate | High |
## How to choose
- Is the enclosure used in a corrosive environment (e.g., near saltwater, chemicals)? → 3926.90
- Does it need high mechanical strength or security against tampering? → 7325.10
## Overlaps & pitfalls
A product may combine both materials (e.g., steel frame with plastic cover), but the primary material determines classification. If unclear, prioritize based on the dominant structural material. No option is vague—both are well-defined by material composition