WD65 NI (50) + WT116 NI system has been mostly applied to expert rooms, meeting rooms and law firm offices due to remarkable sound insulation performance, according to applying high quality hardware, and precise frame-design. It provides openness assessment and quiet sound environment. It has been connected glass to glass joint by dry finishing materials without silicon to show simple design.

WT65 NI (low) has maximum openness assessment through slim frame (frame depth: 44mm). Made in Germany high-performance hydraulic door closers or electronic door closer can be applied for convenient passing. An auto-drop seal which has been applied at the bottom of the doors makes better performance to be sealed.