·With a thickness of up to 68mm wood, the materials are durable and can be used for tall and large windows and doors;
·Airproof glue is applied between the glass and the frame or sash at the exterior side to enhance sealing;
·Widened airproof glue strip on the interior side conceal the nail holes on the spacers, enhancing the aesthetic appearance and making it easier to replace the broken glass;
·The design of aluminum alloy drainage board protects wood and facilitates drainage;
·Extra sealing strip on the sash enhances sealing, and meanwhile conceal the hardware parts to enhance aesthetic appeal.