top hung window single or double glass water proof, space saving Aluminum top hung windowFeature:water proof,space saving, open inward or outward.can ... treatment: Powder coating, Electrophoresis, Anodize and PVDF.Glass: Single or double glass(tempered glass, figure glas, frosted glas, coated glass, low ... etc(Europe standard channel)Sealant: EPDM, PVC, SILICONE ETC. top hung window