This Pella double hung window (Item CDH01) measures 23-1/2"W x 57"H and is in like-new, in-box condition with no damage. It features an aluminum exterior in white and a wood interior, with black grids and annealed, one-wide advanced Low-E glass optimized for high altitude. Solar heat gain coefficient is 0.27 and visible transmittance is 0.50, offering good natural light with solar control. Ideal for Colorado's climate conditions.