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5 x 9mm ( 3/8 inch )5 x 13mm ( 1/2 inch )5 x 19mm ( 3/4 inch )5 x 25mm ( 1 inch )5 x 32mm ( 1 1/4 inch ) Measurement is the tool hole size
Universally handed no need for left or right units
Pack of 125
Protrudes: 180mm from wall when mounted
Angle thickness: 2mm
Grey Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Pack Size:10 5 x 9mm ( 3/8Product Description Grey 9" x 3" Air Brick Vents Plastic interlocking air brick ventilator. Clip together facility provides a choice of ventilation sizes. Can be stacked together to create 9" x 6" and 9" x 9" combinations. Moulded in mortar key ensures secure adhesion to the building fabric. Meets NHBC requirements for the control of condensation in buildings. Manufactured to BS 493: 1995 + A1: 2010. Other colours and ventilation fittings for this
