1.Frame Thickness: 1.2mm; Frame: 115mm width.2.Bottom sliding designs with ladder type 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: 21.4mm, could install 5mm+9A+5mm tempered glass.6.The series can be splicing window and bay window.