1. Primarily installed in ceilings.
2. Made of strong aluminum materials.
3. White powder-coated finish.
4. Special screw and nut lock for easy opening and long service life.
5. Piano hinge allows nearly 180-degree opening.
6. The door is non-removable.
7. Quick and easy installation.
8. Custom sizes and colors available.
9. Packaging: Each piece in a bubble bag, then packed in a carton; pallet packaging is available.
Advantage:
1. Piano hinge enables 180-degree opening.
2. Special screw and nut lock ensure easy operation and durability.
Regular size:
| Item | Size | Neck size(MM) | Overall size(MM) |
| HFSA-AP600 | 300x300 | 300x300 | 362x362 |
| 400x400 | 400x400 | 462x462 | |
| 450x450 | 450x450 | 512x512 | |
| 500x500 | 500x500 | 562x562 | |
| 600x600 | 600x600 | 662x662 |