1.Frame Thickness: 1.6mm; Frame: 96mm width.2.Bottom sliding designs with ladder type to be more smooth drainage.3.This series can be made of three-track with gauze (External).4.The sash connected by a tap to improve air-tightness and water-tightness and thebottom sash with a leather strip5.Glass slot: 21mm, could install 5mm+6A+5mm tempered glass6.The series can be splicing window and bay window.