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Andersen TW21062 (Lower Sash) White Exterior and Natural Pine Interior High Performance LowE4 Glass - No Grille Grommets Unit Number_244DH2850 Andersen 3042 Double-Hung Full ScreenAndersen TW21062 (Lower Sash) White Exterior and Natural Pine Interior High Performance LowE4 Glass No Grille Grommets This Sash has no grille grommets, any interior grilles for this window will need to have the chisel style plungers. This sash has new High Performance Low E4 glass and replaces previous versions of Low E glass. Low E4 glass showed up to 25% in savings on cooling bills and 10% on heating bills over ordinary dual pane glass. Protects