... 72mm,52mm Frame face width43mm Sash face width72mm Glazing option5mm single glass, 12mm tempered glass, 5+9(12)Argon+ ... stricken regions Multifunctional notches (8mm,21mm,25mm,38mm),can hold single-layer , laminated , hollow silver lattice , hollow security lattice ... frame design can be configured single /dual push-pull type and inside opening mosquito and dust prevention device , can also effectively ...