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5 x 12mm ( 1/2 inch )5 x 16mm ( 5/ inch )5 x 20mm ( 3/4 inch )5 x 25mm ( 1 inch )5 x 32mm ( 1 1/4 inch ) Measurement is the tool hole size
With a great range of colours available you can use them to complement your existing colour scheme- or use them as the basis of a completely new one
Excellent airflow properties
230V/20Watt
Red size: 5
2 x Cavity Wall Combination Extension Sleeves for 9" x 3" Air Brick Vents G935 roofline_vents 5 x 12mm ( 1/2Manthorpe G935 Extension Sleeve Pack of 2 Extension Sleeve 9" x 3" for cavity wall ventilators. Part number: G935. Each pair of extension sleeves adds on a extra 120 280mm to the airbrick. Designed to fit to the back of a G930 airbrick. Further horizontal extension can be added. Alternatively it can be stacked to form 9" x 6" or 9" x 9" formations. Provides a maximum equivalent area of 6600mm Meets NHBC requirements for the control of condensation in
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