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6,450mm² of airflow per 9"x3" airbrick. Can be stacked together to create 9"x6" and 9"x9" combinations. Integral mortar key ensures secure bond to the brickwork. Available in various colours to suit different substrates. Louvred grille prevents the entry of large insects
6,450mm² of airflow per 9"x3" airbrick. Can be stacked together to create 9"x6" and 9"x9" combinations. Integral mortar key ensures secure bond to the brickwork. Available in various colours to suit different substrates. Louvred grille prevents the entry of large insects