This Pella Impervia fixed casement window measures 71.5" W x 47" H and is constructed of durable white aluminum with a decorative grid pattern. It was pre-installed but is in like-new condition and comes in its original box. Key performance specs include Low-E 180 glazing, argon gas fill rated for high altitude, a Solar Heat Gain Coefficient of 0.44, and a Visible Transmittance of 0.55 — making it an energy-efficient choice for Colorado climates. Annealed glass. Fixed (non-operable) configuration. SKU: WIN-ON-56817.