Grey Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Pack Size:10 Universally handed no need for

Universally handed no need for left or right units

Manufactured from cast metal with a satin white finish

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

Pack of 125

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

Grey Combination Air Brick Vents 9" x 3" for Air Flow Ventilation Pack Size:10 Universally handed no need forProduct 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