The YY90HT swing door has NFRC certification and passed NAMI certification. The window adopts a hidden hinge design. The handle adopts a German brand and has been tested for 100,000 operations. The triple-layer glass makes the window better insulated. Adopt large load: Bearing silent hinge, if you want to know more about YY120 series outward opening window. Please click the link below to enter the official website or contact us via the email below.
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