Manthorpe Blue & Black Polypropylene Combination Airbrick, Size: 9x3in

The Manthorpe G930 Airbrick has been designed to provide high levels of ventilation into cavity walls and under floor voids. The brick incorporates a front mounted grille with water deflectors Provides high levels of ventilation into cavity walls and under floor voids Provides 7,600mm2 of airflow per 9x3in airbrick Can be stacked to produce 9x6in and 9x9in The brick incorporates a front mounted grille to prohibit large insects gaining access but wide enough not to be blocked by debris, paint or water droplets A mortar key around the edge of the airbrick ensures secure adhesion to the building fabric while a clip together facility provides a choice of ventilation sizes