2 x Cavity Wall Combination Extension Sleeves for 9" x 3" Air Brick Vents G935 roofline_vents 5 x 12mm ( 1/2

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

Buff / Cream Cowl Vent Cover

Pack of 288

Be safe and legal with this genuine product

• Integrated LED worklight

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