cartridge heater 1,material:stainless steel 304/321/316 2,nickel chrome resistance wie(Ni 80%) 3,guarantee time: one year Cartridge heaterOur company designs, manufactures and exports all types of Industrial Electric Heaters, Heating Elements, Band Heater, MICA Band Heaters, Ceramic Band Heaters, Strip Heaters, Tubular Heaters, Cartridge Heater, Hot Runner Heater & Bushes, Manifold Heaters, ...