Manthorpe Grey Interlocking Air Brick Vents Pack Size:10 Overall vent size: 9½" x

Overall vent size: 9½" x 6½"  (240mm x 165mm)

30  x    9mm            ( 3/8 inch )30  x  13mm            ( 1/2 inch )24  x  19mm            ( 3/4 inch )24  x  25mm               ( 1 inch )12  x  32mm         ( 1 1/4 inch ) Measurement is the tool hole size

1/4" - Qty 15

Curved: 200mm x 175mm

Manthorpe Grey Interlocking Air Brick Vents Pack Size:10 Overall vent size: 9½" xProduct 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