Slim, strong and insulating profiles combined with high quality glazing to create a thermally efficient window which is robust and easy to maintain. Outward opening vents with fixed panels. Overall height includes PVC sill. Left-Hand Side-Hung 28mm Argon-Filled Low E Insulating Glass 15 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.3W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile High Security Locking System uPVC Sill White Handle Left-Hand Side-Hung 28mm Argon-Filled Low E Insulating Glass 15 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.3W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile High Security Locking System uPVC Sill White Handle