Similar windows down and doors aluminum clad wood structure Rijia BRIGHT IV68 series of copper-clad wood open within the inner copper clad wood windows and doors are the main characteristics of bronze and wood are combined into one, noble materials made of bronze, bronze exceptionally durable surface It is the ideal solution for restoring and updating an old building, this particular bronze structure that used to be used to make called "bronze building" without any skin protection and maintenance. Copper and aluminum surface is the best and most natural form lasting protective barrier, which accelerates the natural formation of polished patina, which can make the effect of having a "retro bronze" in.