Timloc TELESCOPIC VENTILATOR Features And Benefits ¨ Telescopic and adjustable for a step of 3, 4 or 5 brick courses ¨ Horizontal and verticle extension accessories available ¨ Equivalent of 6000mm² per unit ¨ Special grille included to prevent entry of vermin ¨ Durable, robust and totally resistant to decay  TIMLOC Telescopic Ventilator