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The telescopic feature enables it to be adjusted between 3 and 5 brick courses and 6 - 7 courses with supplied extension sleeves
Pack of 288
• Integrated LED worklight
Continuous panel can be installed in one go
Be safe and legal with this genuine product
2 x Cavity Wall Combination Extension Sleeves for 9" x 3" Air Brick Vents G935 roofline_vents The telescopic feature enables itManthorpe 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