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200g each) and easy to handle
It is CE marked and meets European rules on the manufacture of PPE
Be safe and legal with this genuine product
Excellent airflow properties
automotive domestic and industrial use
2 x Cavity Wall Combination Extension Sleeves for 9" x 3" Air Brick Vents G935 roofline_vents 200g each) and easy toManthorpe 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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