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These vents are not a product of Marley but are designed to fit Marley products
For new build and modern brick houses
For indoor and outdoor applications
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Manthorpe Grey Interlocking Air Brick Vents Roofing These vents are not aProduct Description Manthorpe Grey 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