The left guard door and window is good. Compared with plastic doors and windows, Weidun doors and windows have the advantages of fire prevention, durability, environmental protection and energy saving. Eaton doors and windows attach great importance to product design, using hard aluminum alloy material, unique sliding block to reduce friction, guide wheel support block to make doors and windows open and close smoothly, multi-point locking, enhancing water tightness and air tightness of doors and windows, safe and reliable.