Grey Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Pack Size:10 Angle thickness: 2mm

Angle thickness: 2mm

Each pair of extension sleeves adds on a extra 120 - 280mm

Protrudes: 180mm from wall when mounted

Max load: 22

Grey Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Pack Size:10 Angle thickness: 2mmProduct 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