Pella 250 Series White Vinyl Horizontal Sliding Window in like-new, in-box condition with no damage or missing parts. Dimensions: 47.5"W x 59.25"H. Configuration is XO (one venting sash, one fixed sash). Includes annealed Low-E 180/i89 double-pane glass with argon gas fill and high-altitude specifications — ideal for Denver and Colorado Front Range homes. The 250 Series is known for its energy efficiency, durable vinyl frame, and low-maintenance design. A great opportunity to get a quality Pella window at a significant savings.