... open inward or outward economic and scientific structure Aluminium casement windowFeature:Elegant style, space saving, open inward or outward.Economic and reasonable structure, good water and ... aluminum alloy extrusionSurface treatment: Powder coating, Electrophoresis, Anodize and PVDF.Glass: Single or double glass(tempered glass, figure ... channel)Sealant: EPDM, PVC, SILICONE ETC. aluminum window