- for added strength.
- for ease of cleaning.
- help protect against air infiltration and add a finished look to the window interior.
- ensures years of easy, smooth operation of the sash.
- at all sash points for protection from air, water, dirt and noise infiltration.
- 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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