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Blue / Black Interlocking Air Brick Vents. Blue / Black Interlocking Air Brick Vents. Pack of 5. Manthorpe part number: G930. Can be clipped together to create 9" x 6" and 9" x 9" combinations. Meets NHBC requirements for the control of condensation in buildings.
Blue / Black Interlocking Air Brick Vents. Blue / Black Interlocking Air Brick Vents. Pack of 5. Manthorpe part number: G930. Can be clipped together to create 9" x 6" and 9" x 9" combinations. Meets NHBC requirements for the control of condensation in buildings.