... your size suit for all kinds of windows SpecificationsAluminum window with concealed flyscreen: the flyscreen could be hidden or up and ... this flyscreen:(1)Our windows and doors can be fitted with concealed fly-screen, which can effectively stop mosquitoes, dust ... fire-resisting. (4)two kinds of profile: non thermo-break profile and thermo-break profile,(5)surface finish: mill finish, anodizing, ...