Dear :Sir/Madam, Good day！ I am andrea from QINGDAO ROCKY WINDOW CO.,LTD. We are professional manufacturer of process glass . Our main products include Building glass( Float glass ,tempered glass , laminated glass,hollow glass , pattern glass , mirror and so on )  Moreover we also a factory of aluminum /plastic steel windows and doors, curtain walls product supply system.we have professional team for designing,producing . Our top-hung opening window to achieve U<1.27W/m2K ,To achieve the most advanced level in China. We are making great efforts to develop new products to meet different requirements.If you have any interest, please contact asap,  Best regards Andrea Export manager ................................................. QINGDAO ROCKY WINDOW CO.,LTD Factory Add: NO.10089 LINGANG ROAD HUANGDAO AREA ,QINGDAO CITY .CHINA . TEL: 0086 13656399370 SKYPE: Glass01277 Email:rockyglass27@yeah.net WEB: HTTP://WWW.ROCKYSYSTEM.COM