Roto Fixed Features: Close Window Knot-free pine veneered wood frame, stain grade Factory installed, built-in condensation gutter Heavy-duty double air seal EPDM gasket for a weather-tight seal Sealed corners for weather-tightness Pre-grooved on all sides for sheetrock - a real timesaver Pre-installed brackets - facilitates installation Two energy-efficient glazing options Metal spacer filled with desiccants to absorb moisture and prevent fogging