The Series 300R replacement window line is the ideal choice for value-seeking buyers that are looking for a simple, straight-forward window replacement solution that do not require operational upper sash. This window features tilt-out lower sash for easy cleaning. The long-lasting constant-force balances come standard. To ensure a clean & easy installation, head expander and sill extension are also included. The Series 300R windowed line also features Energystar® qualifying level thermal efficiency with the standard soft-coat Low-E and Argon filled insulated glass, offering one of the best valued products in the market.