we are Suredone Industrial Co., Ltd.-a bridge-cut aluminum alloy windows and doors exporter from China. Bridge-cut aluminum alloy profile is advanced technology which endows thermal break and sound insulation functions. We have been having a good sale of bridge-cut aluminum alloy windows and doors in China. It is a booming industry, which the annual growth rate reaches up to 60%. We are looking for foreign business partners. If you are interested, please feel free to contact us.