## Common ground
Both options describe enclosures for housing aquatic or terrestrial life, such as fish or plants, with transparent walls for viewing.
## Options at a glance
**3926.90 – Made of plastic material**
- **Defining trait:** Constructed primarily from plastic, offering lightweight and impact-resistant properties.
- **Typical examples:** Acrylic tanks, PET resin terrariums, molded plastic aquariums.
- **Best fit when:** Durability, portability, or cost-effectiveness are priorities; common in home setups or educational use.
**7013.10,7013.9X – Made of glass**
- **Defining trait:** Built from glass, providing superior clarity and scratch resistance.
- **Typical examples:** Standard aquariums, display terrariums, custom-built glass enclosures.
- **Best fit when:** Visual clarity, long-term use, or professional/esthetic appeal is key.
## Key differences
| Feature | 3926.90 (Plastic) | 7013.10,7013.9X (Glass) |
|------------------|--------------------------|------------------------------|
| Material | Plastic (e.g., acrylic) | Glass |
| Clarity | Slightly lower | High |
| Weight | Light | Heavy |
| Durability | Impact-resistant | Brittle, breaks under stress |
## How to choose
- Is the enclosure made of a rigid plastic like acrylic or PET? → 3926.90
- Does it use glass panels or sheets for walls? → 7013.10,7013.9X
## Overlaps & pitfalls
Some products use both materials (e.g., glass front with plastic sides), but the primary structural material determines classification. If unclear, prioritize the main wall material. The term "plastic" includes acrylic, which is often mistaken for glass due to clarity—confirm material type. No option inherently takes priority; choose based on the dominant construction material