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
Anthracite Grey Trickle Vent Canopy-CAL5100 Aluminium Canopy
Aluminium Trickle Vents for Windows, VAL3300, 2500EA, Anthracite Grey, 335mm
Aluminium Trickle Window Vents, VAL5100, 4000EA, Anthracite Grey, 475mm
White Trickle Vent Canopy-CAL8000 Aluminium Canopy
Brown Trickle Vent Canopy-CAL8000 Aluminium Canopy
Brown Trickle Vent Canopy-CAL5100 Aluminium Canopy
