Hot Runner Coil Heater is made of nickel chrome resistance wire placed inside chrome nickel steel tube filled with MgO powder and compacted for faster and efficient heat transfer. The heaters are annealed to acquire malleability for bending into any shape. Hot runner heaters with built-in thermocouples are also available. Hot runner bushes are produced with hot runner heaters of the different cross-sections with inner brass and an outer stainless steel cover.