1. Patented anti falling products;                                                                       
2. High and low rail drop track design, unique professional drainage device;                                                                                                                    3. The stainless steel track configuration ensures that the track is not easy to be damaged; the high bearing pulley can open and close smoothly;                
4. 45 ° splicing of internal fan, simple and fast;                                                 
5. Adopt two-point side lock to improve the air tightness of the whole window;                                                                                                                      6. Children's safety protection lock is equipped as standard to ensure life safety;                                                                                                                             7. Ergonomic handrail design, small potted plants can be placed to increase the ecological atmosphere;                                                                                8. Fixed guardrail or open guardrail can be selected for lower fixation to highlight the beautiful effect of the whole window;                                             9. Standard 5mm + 12a + 5mm hollow glass.