Crystal uPVC Window, Double Glazed, Black/White, Top-Hung Opening, Over Fixed Light, 1040 x 610 x 70mm, Obscure Glazing. The Crystal uPVC double-glazed window employs a high-performance, energy-efficient glazing assembly, achieving an A Rating in thermal performance. The window is equipped with espagnolette locking hardware, integrated trickle ventilation system, and includes a handle, PVC cill, and glazing packers for securing the glazing unit. Overall height measurement includes the cill. All hardware and product orientations are specified from the external aspect. A Rated window with an overall U Value of 1.4 W/m2K. Low E 28mm glazing unit including argon gas and Warm Edge spacer bar White handle and cill included (cill is included in the OA product height) Espag locking including night vent position allowing two locked positions for the sash Trickle Ventilation allowing controlled air into your habitable room Sizes shown are actual product sizes, the height includes 30mm for the cill