1- Tilt &Turn UPVC High Energy Efficiency Window 33.5×23.5 MADE In USA
Double glaze : 0.02 or betterDouble glaze : 0.58 or better. Tilt & Turn HIGH ENERGY EFFICIENT. FEATURING: 1. Acoustic Insulation: Dual glaze: Rw = 28dB (VG4-4/24/4). Glazing : Dual glaze : Standard option: Two-pane set 4/24Ar/4mm ?.