Works with Perma-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.
White color is used on sash that are factory prefinished white or painted in white.