Centre-pivot roof window with an integrated expanding thermal collar, warm edge glazing and streamlined fit. Suitable for single or multiple applications in any roof with a pitch of 15-90. Conveniently placed opening handle at the top of the window helps to control ventilation, giving the option of fresh air flow even when the window is locked and secure. Glass, pine and aluminium construction. 25mm Argon-Filled Low E Laminated and Toughened Glass U-Value: 1.3W/m²K 10 Year Manufacturer's Guarantee (T&Cs Apply) Ventilation via Handle Centre-Pivot Easy Cleaning & Low Maintenance 25mm Argon-Filled Low E Laminated and Toughened Glass U-Value: 1.3W/m²K 10 Year Manufacturer's Guarantee (T&Cs Apply) Ventilation via Handle Centre-Pivot Easy Cleaning & Low Maintenance