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Low profile In-line design and discreet low profile design
Also helps to prevent the entry of birds and large insects
4mm wide front aperture prevents entry of large nest building insects into the cavity
Screw size: 8 x 2 inch
Fixing screws included
Terracotta Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Vents & Ventilation Low profile In-line design andProduct Description Terracotta 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
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