We, Shanxi Rescue & Protection Technology Co., Ltd, are a major research and manufacturer for Nano-gold-Catalysts and respirator. The quantity of our Nano-Gold -Catalysts is 5Tons/year, and we have applied it to our products--filter self-rescuers and combination self-rescuer. In the meantime, we also produce a wide kind of filter poison cans for fire escaping or military defence.