To provide ventilation below suspended ground floors. Telescopic and adjustable for a step of 3, 4 or 5 brick courses. Special grille incorporated to prevent entry of vermin. Equivalent of 6000mm2 per unit.
- Provides ventilation below suspended ground floors
- Telescopic & adjustable from 3 - 5 courses
- Equivalent of 6000mm2
- Special grille included to prevent entry of vermin
- Durable, robust and totally resistant to decay