1.Frame Thickness: 1.4mm; Frame: 103mm width.2.Bottom sliding designs with laddertype for more smooth drainage.3.This series can be made of three-track with gauze (External).4.The sash connected by 45° angle connector to improve air-tightness and water-tightnessand the bottom sash with a leather strip.5.Glass slot: 24mm, could install 6mm+9A+6mm tempered glass6.The series can be splicing window and bay window.