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000m square metres of airflow
The protruding drip feature on the front face of product directs moisture away from the wall rather than down onto it which could lead to unsightly stains and damp patches
Imperial Assorted Nitrile Rubber O-Rings
Coloured face blends with the surrounding masonry
Width: 310mm
Manthorpe Brown Interlocking Air Brick Vents Pack Size:20 000m square metres of airflowProduct Description Manthorpe Brown 9" x 3" Air Brick Vents Plastic interlocking air brick ventilator. Part number: G930. Provides 6,450mm of airflow per 9" x 3" airbrick. Clip together facility provides a choice of ventilation sizes. Can be stacked together to create 9" x 6" and 9" x 9" combinations. Additional G935 extension sleeves available in . Moulded in mortar key ensures secure adhesion to the building fabric. Meets NHBC requirements for the