-Produced by wooden, German style, with firm connection and tidy assembly;
-Double-sealed insulating glass;
-Sealed drain system with excellent airproof and waterproof ability;
-Varieties of opening ways and optional aeration effect;
-Carrying the “equal size room” theory has excellent heat-preservation, sound insulation and less-transfiguration ability;
-Can be connected with all kinds of German wooden doors and make the series more prefect;
-The slim frame let the window obtain the large lighting area and bright effect; as well as need less profile and be economy at factually.