... ,Security window 2,Quality guarantee period:15-20 years 3,Assembled design, 4,easy to install. 5,High quality Security Window1 ... ,Security window2,Quality guarantee period:15-20 years 3,Assembled design, 4,easy to install. 5,High qualityMore instruction:1 ... . assembled security window, easy to install; 2. stainless stell secure screw, ...