... . CertificateISO9001 : 2000Window styleEuropean styleOpening styleSliding, casement /swing, turn-tilt, tilt-sliding, single-hung, double-hung, etc.Specification(size, ... performaceHardwareHigh quality Chinese hardware, Guoqiang (Multi-point lock and handle) , G-U or ROTO ,Chugn ,Lianxin Brand ... PVC windows, Aluminum windows, hardware for window (door handle,door hinge) and doors and rubber sealing strip, ...