If replacing trickle vents to the exterior side of the window then use these aluminium tickle vent canopies for extra strength. - Available in Anthracite Grey
Brown Trickle Vents-VAL8000 Aluminium Trickle Vent
Black Trickle Vents-VAL3300 Aluminium Trickle Vent
Aluminium Trickle Window Vents, VAL5100, 4000EA, Anthracite Grey, 475mm
Aluminium Trickle Ventilators, VAL6300, 5000EA, Anthracite Grey, 565mm
Aluminium Trickle Vents for Windows, VAL3300, 2500EA, Anthracite Grey, 335mm
White Trickle Vent Canopy-CAL5100 Aluminium Canopy
