- Works with Perm-Shield Narroline Double-Hung (non-tilt) windows manufactured from 1968 to Present.
- Works with 400 Series Tilt-Wash Double-Hung windows manufactured from 1992 to Present.
- The grille grommet fits on the interior edges of the window sash and allows the window to accept grilles.
- The gromments need to be punch out in the center to accept grilles.
- Used on sash that are natural wood or sandtone color interior.
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