Manthorpe G930 Airbrick is a high performance plastic airbrick designed to provide high levels of ventilation into cavity walls and underfloor voids in residential and commercial construction. The 9x3 inch format fits a standard single brick aperture and is stackable — multiple units can be joined together to create larger vent openings where higher levels of ventilation are required. The airbrick features a front mounted grille with evenly spaced openings specifically sized to prohibit large insects from gaining access whilst remaining wide enough not to restrict airflow. Suitable for new build installation and retrofit. Available in six colours — terracotta, buff, white, grey, blue/black and brown — providing a good match for most common brick and masonry finishes. Benefits Fits a single brick space Stackable and joinable for larger vent openings Enables a high level of airflow Good to know Dimensions in mm; 216mm x 70mm x 58mm Free vent area 6,450m² Integral vermin grill