1. 26-gauge galvanized steel curtain
2. Siliconized Polyester primer and top coat
3. Extruded aluminum bottom bar with structural steel angle for maximum strength
4. Dual galvanized steel slide bolt locks attached to the bottom bar
5. Heavy-duty galvanized steel guides hot dipped for maximum strength and rust resistance
6. Interior and Exterior polypropylene wear strip to reduce friction and ensure smooth and quiet operation
7. 12" drum assembly
8. Steel bearing shaft support
9. Structural steel wall mounting bracket
10. 4:1 reduction gear chain hoist standard for doors over 100 sq. ft.