1.Frame Thickness: 1.4mm; Frame: 99mm width.2.Bottom sliding designs with laddertype 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 the bottom sashwith a leather strip.5.Glass slot: 22mm, could install 5mm+9A+5mm tempered glass6.The series can be splicing window and bay window.