1.The up-and-down sliding window is a very innovative product and has been widely used.

2.The glass can be composed of glass of different thicknesses, which can better insulate sound, heat and keep warm, preventing damage from sunlight and external noise.

3.The sash uses brush-type sealing strips of equal length to form good air tightness and water tightness, and the profile in the middle of the window is equipped with brush-type sealing strips to enhance the sealing performance between the sashes.

4.The application of aluminum makes the window have reliable anti-theft performance. The accessories are screwed on the aluminum, providing safety performance.