From The Anvil Small Aluminium Trickle Vent
Size: 239mm x 17mm
Slot Size: 195mm x 12mm
Equivalent Airflow(EB): 800 mm2
Brown 91004 (12551)
Black 91001 (12548)
White91005 ( 12552)
Infinitely controllable. Easy to fit. Suitable for timber and ideal for night ventilation, does not compromise on security. User friendly operation.