Robust, thermally efficient PVC-U casement window features high quality triple glazing and strong, slim profiles. Outward opening. Durable and easy to maintain. Overall height includes the sill. Right-Hand Side-Hung 36mm Argon-Filled Insulating Glass 10 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.0W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile Locking Mechanism uPVC Sill White Handle Right-Hand Side-Hung 36mm Argon-Filled Insulating Glass 10 Year Manufacturer's Guarantee (T&Cs Apply) U-Value: 1.0W/m²K Trickle Ventilation 70mm Internally Beaded uPVC Profile Locking Mechanism uPVC Sill White Handle