1- Tilt & Turn UPVC HIGH EFFICIENCY CASEMENT WINDOW 23.5″x38.5″ Made In USA
D ual glaze : 0.02 or better D ual glaze : 0.48 or better. Tilt & Turn HIGH ENERGY EFFICIENT. Acoustic Insulation: Dual glaze: Rw = 32dB (VG4-4/24/4). Glazing : D ual glaze : Standard option:Two-pane set β 4/24/4mm Low-E.