Dual-tube system
- System for ventilation holes up to 150 cm high and 35 m long (or 2 x 30 m)
- Upper and lower tubes: 1/2” steel, galvanised
- Drive: Dyna-One 5 mm
- Side or centre drive mechanism
- Assortment of 5 ventilation screens
- 4 types of wind covers with hem
- Closing upwards
- Storm barrier made of 1/2″ tube, galvanised steel, encased in plastic