DucoWall Classic W 20Z
Technical characteristics
| Louvre blade pitch | 35 mm |
| Blade depth | 23 mm |
| Depth to fit: | |
| 50/12 support mullions | 35 mm |
| 21/50 support mullions | 73 mm |
| 50/50 support mullions | 73 mm |
| Physical free area | 47 % |
| Maximum span between 2 support mullions | 1162 mm |
| Insect screen | Available as an option |
| Type of mullion | 50/12 (light) 21/50 (heavy) 50/50 (heavy) |