• Realization of a numerical value of airtightness performance of 0.00㎥/(h•㎡) using a window-tightness structure.

• 45 degree assembly of horizontal and vertical frames creates a clean and beautiful appearance.

• Secure stability with the independently developed gasket strip's sliding door separation prevention function.

• Since we don't use mohair, mohair doesn't rot and fly away, so not only health problems but also economic losses are reduced.