1.All-aluminum or stainless steel, never rust. 2.Absolutely ... plants, pest and disease control, the original operating heavy, high cost, pollution and difficult to control conventional pest control becomes ... Save power, long-life design:Evaporator power of 50W, 1/3 of the conventional heater power, thereby greatly reducing power ... of up to 5 years. Electric Sulfur Evaporator for hydroponic grow tent