- for added strength.
- for ease of cleaning.
- covers help protect against air infiltration and add a finished look to the window interior.
- eliminate sash cords, weights and pulleys, and make opening and closing the window easier.
- Protective at the sill acts as a secondary weatherstripping.
- for a clean, consistent appearance.
- Color-coordinated limit the movement of the sashes from the interior and exterior while allowing for ventilation.
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