High SecurityuPVC windows incorporate multi-locking systems providing a high level of security for homes or businesses. Most uPVC window locking systems lock at multiple points all around the sash and frame.      uPVC ProfileChinese Top Trademark CONCH German VekaReinforcement steelThickness: 1.5 mm , 2.0 mmGlassSingle glassDouble glazedTriple GlazedLaminated glassLow-e glassReflective glassHardware1. Chinese top trademark Kinglong2. German ROTO and Siegenia AubiScreenRetractable screenRubber StripEPDM