We have access to returned vinyl windows (to the manufacturer) windows are in excellent shape and were returned because of mis measuring. Both replacement and new construction sizes are available. Attractive contoured frame fits with any home style. Dual-paned glass unit can be ordered with optional Low E glass and an Argon gas fill to maximize energy efficiency. Insulating glass unit is set ½ inch into the sash to keep edges warmer. Frames and sash, welded at the corners, create strong, effective units. Weatherseals placed at key points around each sash increase weather performance by reducing air flow. Optional Low E/Argon-filled insulating glass unit provides years of energy efficiency. The U-channel spacer system is more efficient than conventional box spacers because it reduces conduction rates. These windows meet the Energy Star rating. We ship windows via Federal Express.