Thermal Break Aluminum Sliding Windows and Doors: Material: Top Quality Thermal Break Aluminum Profile Finishing: Quality Powder Coating Finishing, All RAL Colors Available Glass: Fully Tempered Safety Double Glazing: 5+23A+5, Advanced Low-E Coating; Argon Filled, TGI Warm-Edge Spacer Hardware: Top Quality Hardware & Accessories. Other: Simulated Divided Lites.