The Pella 150 Series XO sliding window measures 47.5"W x 47.5"H and features a durable white vinyl frame. The XO configuration includes one sliding vent panel and one fixed panel for easy ventilation control. Glazing is annealed glass with Low-E 180/Clear coating and high-altitude argon gas fill for excellent energy performance. NFRC certified energy ratings: U-Factor 0.30, Solar Heat Gain Coefficient 0.53, Visible Transmittance 0.64. Item is new and unused with original labels and screen still in place. Includes screen. No damage or missing parts. Ideal for bedrooms, living rooms, or any standard rough opening requiring a 48"x48" window.