1. Outer Frame: 120mm Width; Thickness: 2.0mm; Inner Sash Glass Slot: 31mm. The widest could be equipped with (6+ 15 gille+ 6) hollow louver and 24mmbulletproof glass, etc;2. Multiple opening way, superior air tightness and high safety performance;3. Multiple Configuration: Single Lift up Sliding, Double Lift up Sliding; Double Lift-up Sliding With Middle Fixed; Fixed Two Side & Middle Double Sliding, etc;4. Hardware: SIEGENIA or KIN LONG;5. Life-up then sliding to open the door, the roller no need to bare the weight of the door when it close;6. This design not only extend the utility of the sliding door, but also solve the se alability of the sliding door7. Opening sash achieve large glass with better lighting;The limitation of single sash is 3600 mm width and 2800 mm height, and bearing capacity is 400 kg. (SIEGENIA)The limitation of single sash is 3000mm width and 2675mm height, and bearing capacity is 300kg. (KIN LONG )8. The door sash could firmly stay on any position of the track by the lift-up handle9. When the door sash lifts up, the air-tightness material will separate from the outer frame, which effectively reduces the friction resistance, and improves thesmoothness of sliding; when the door sash descends, the air-tightness material will completely seal with the outer frame, which greatly improves the performanceof air-tightness, water tightness and sound-proof;10. Invisible threshold design, unobstructed access11. Suitable for balcony, study room and garden;12. Weight of Square Meter: 8.4kg.