1,Security window 2,Quality guarantee period:15-20 years 3,Assembled design, 4,easy to install. 5,High quality Security Window1,Security window2,Quality ... , 4,easy to install. 5,High qualityMore instruction:1. assembled security window, easy to install; 2. stainless stell secure screw, anti-dismantle ... new after rain washingPlease contact us freely for futher question! security window