SkylightManual opening safety glass skylightglass skylightcasement window Triple tempered glass casement window Series:80 Series thermal break casement windowProfile thickness:2.0mmGlass:5mm+12Argon+5mm+12Argon+5mm triple tempered glassCertification:NRFC、CSA、AS2047U-Factor:0.20 SHGC:0.23Inquiry